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Ibeere 1 Ìròyìn
A discontinuous morphological variation often used in crime detection is the
Awọn alaye Idahun
In crime detection, the most popular discontinuous morphological variation used is finger prints.
Here's a simple way to understand why:
Defining Morphological Variation: Morphological variation refers to differences in the form and features of living organisms. A variation is termed as 'discontinuous' when it falls into distinct categories with no intermediates. For example, you either have a particular feature or you don't.
Why Fingerprints are Discontinuous: Fingerprints are a good example of discontinuous variation because each individual's set of fingerprints is unique. There are no gradual transitions – you either have a specific fingerprint pattern, like a loop, whorl, or arch, or you don't.
Application in Crime Detection: Because everyone has a unique set of fingerprints and these can be easily left on surfaces, fingerprints are a powerful tool in crime detection. Investigators gather fingerprint evidence from crime scenes and compare them with fingerprint databases to identify suspects.
In conclusion, the use of fingerprints lies mainly in their uniqueness and distinctiveness, making them crucial for identifying individuals in forensic investigations.
Ibeere 2 Ìròyìn
The cone in the retina of eye is an example of
Awọn alaye Idahun
The cone in the retina of the eye is an example of a cell. Let me explain this further in a simple and comprehensive way:
Our eyes have a part called the retina, which is like a screen at the back of the eye. It captures the images we see and sends them to the brain for processing. The retina contains special cells that help us detect light and color. These are primarily two types: rods and cones.
The cones are specialized cells in the retina responsible for allowing us to see in color. They function under bright light conditions and help us perceive different colors and details. There are three types of cones, each sensitive to: red, green, or blue light. Together, they allow us to see a full spectrum of colors.
Therefore, in the hierarchy of biological organization, a cone is considered a cell, as it is the smallest functional unit that contributes to vision.
Ibeere 3 Ìròyìn
A trait that is always expressed during crossing of hereditary characteristics is
Awọn alaye Idahun
When discussing the crossing of hereditary characteristics, a trait that is always expressed is known as a dominant trait. In genetics, traits are determined by genes, and each trait has two alleles, one from each parent. Alleles can either be dominant or recessive.
Dominant traits are those that are expressed in the organism's phenotype when at least one allele for the trait is dominant. This means that even if the organism has one dominant and one recessive allele for a trait, the dominant trait will take precedence and be observed in the individual.
Conversely, a recessive trait is only manifested in the phenotype if both alleles for that trait are recessive. Therefore, when a dominant allele is present, it will mask the expression of a recessive allele, resulting in the dominance of the trait in question.
For example, if a plant has one allele for tall height (dominant) and one for short height (recessive), the plant will appear tall because the tall allele is dominant.
Ibeere 4 Ìròyìn
Which of the Nigeria states is Northern guinea savanna located?
Awọn alaye Idahun
The **Northern Guinea Savanna** is an ecological zone in Nigeria characterized by a mixture of grasslands and scattered trees. This vegetation belt lies between the Sudan Savanna in the north and the Southern Guinea Savanna in the south. The vegetation in this region is adapted to longer wet seasons compared to the Sudan Savanna and shorter ones compared to the Southern Guinea Savanna.
Among the states listed, **Kwara State** is where the **Northern Guinea Savanna** is located. Kwara is positioned in the north-central part of Nigeria, which aligns with the geographical location of the Northern Guinea Savanna. It features the characteristic landscape of mixed grasslands and trees, supporting both agriculture and livestock rearing.
In contrast, **Borno and Kano** are located further north, closer to or within the Sudan Savanna zone, which is more arid. **Oyo state**, on the other hand, is located in the southwestern part of Nigeria and is part of the forested regions or the Southern Guinea Savanna, which receives more rainfall and supports more dense vegetation compared to the Northern Guinea Savanna.
Thus, the correct answer is **Kwara State** as it lies within the **Northern Guinea Savanna** ecological zone.
Ibeere 5 Ìròyìn
Use the diagram to answer the question that follows
The flower of plants belongs to part labelled
Awọn alaye Idahun
The flower is the reproductive organ of a plant. It is a plant organ, which is defined as a group of tissues that work together to perform a specific function.
Ibeere 6 Ìròyìn
The bacteria in the large intestine of man synthesizes
Awọn alaye Idahun
The large intestine of humans is home to a diverse community of beneficial bacteria. These bacteria primarily synthesize vitamins, particularly vitamin K and some of the B vitamins, such as B12. They do not typically produce minerals or glucose.
Here's a simple breakdown:
Thus, the correct and simplest answer is that the bacteria in the large intestine primarily synthesize vitamins.
Ibeere 7 Ìròyìn
The pigment carrying oxygen in the blood is
Awọn alaye Idahun
The pigment responsible for carrying oxygen in the blood is haemoglobin. Haemoglobin is a complex protein found in red blood cells. Its primary function is to transport oxygen from the lungs to the rest of the body and return carbon dioxide from the body to the lungs for exhalation. Each haemoglobin molecule can bind to four oxygen molecules, allowing it to carry and efficiently distribute a large amount of oxygen throughout the body.
Here's a simple explanation of how it works:
It is essential to note that while oxyhaemoglobin is simply haemoglobin that has combined with oxygen, the fundamental oxygen-carrying pigment itself is still haemoglobin.
Ibeere 8 Ìròyìn
The part of the flower that develops into seed is
Awọn alaye Idahun
In the process of flowering and reproduction in plants, the part of the flower that develops into a seed is the ovule. Let me explain this in a simple manner:
Flowers are the reproductive structures of flowering plants. They consist of various parts, each with a specific role in reproduction.
Therefore, the correct answer is the ovule, as it is the part that transforms into a seed after fertilization.
Ibeere 9 Ìròyìn
The endocrine gland that is called the master gland is the
Awọn alaye Idahun
The **pituitary gland** is known as the **"master gland"** of the endocrine system. Let us explore why this is important in a simple way.
The pituitary gland is a tiny, pea-sized organ located at the base of the brain, right behind the bridge of the nose. Despite its small size, it plays a crucial role in regulating vital body functions and general wellbeing.
Why is it called the master gland?
In summary, the pituitary gland is termed the "master gland" because it has the ability to control many other glands within the endocrine system, playing a pivotal role in maintaining the body's environment or homeostasis.
Ibeere 10 Ìròyìn
Which of the following factors can lead to overcrowding?
Awọn alaye Idahun
To understand overcrowding, we need to consider factors that increase or decrease a population within a certain area.
High natality refers to a high birth rate. When more individuals are born in an area than those leaving it, the population will naturally increase, potentially leading to overcrowding as the area becomes inhabited by more individuals than it can comfortably support. This is because more births without corresponding departures or deaths means more people vying for the same resources.
Emigration is the process of individuals moving out of a given area to live elsewhere. This movement decreases the population of an area, which would typically help prevent overcrowding rather than cause it. Hence, emigration does not lead to overcrowding.
Competition involves individuals or species competing for limited resources such as food, water, or territory. While it does not directly cause overcrowding, high population density due to overcrowding can intensify competition since more individuals fight for the same scarce resources. Thus, competition is more of a consequence rather than a direct cause of overcrowding.
High mortality means a high death rate. This reduces the number of individuals in a population, which works against overcrowding. With more individuals dying, the population decreases or stabilizes, alleviating pressures that lead to overcrowding.
In summary, among the listed factors, high natality is the most significant contributor to overcrowding as it directly increases population size when not matched by increased emigration or mortality.
Ibeere 11 Ìròyìn
Darwin's theory of evolution is based on the principle of
Awọn alaye Idahun
Darwin's theory of evolution is based on the principle of natural selection. This concept explains how species change over time in response to their environment.
Here's a simple way to understand it: In any given environment, there are more individuals born than can survive. These individuals vary slightly in their traits, such as color, size, speed, etc. Some of these variations might give an individual a slight edge in the environment, helping them to survive better or reproduce more than others. For example, a faster rabbit might escape predators more successfully than slower ones.
These advantageous traits are more likely to be passed down to the next generation. Over many generations, these beneficial traits become more common in the population. This process is known as natural selection because it "selects" the traits that best suit the environment. Consequently, the species slowly evolves and adapts to their surroundings.
The key point is that natural selection is a gradual process driven by the survival and reproduction of individuals with favorable traits in a specific environment. Unlike the other options, it doesn't rely on the use or disuse of organs, the inheritance of acquired characteristics during an individual's life, or sudden genetic changes known as mutations.
Ibeere 12 Ìròyìn
Use the diagram above to answer the question that follows
The part labelled III is
Awọn alaye Idahun
The diagram provided is not visible since this is a text-based interface. However, I can help explain the parts of an insect as they typically relate to the given options: abdomen, head, maxillae, and thorax. Typically, insects have three main body parts: the head, the thorax, and the abdomen. The maxillae are a part of the mouthparts, usually located on the head. Here is a simple explanation of these parts:
Head: The head is the front part of the insect's body where the eyes, antennae, and mouthparts, such as the maxillae, are located. It is the center for sensory input and feeding.
Thorax: Located just behind the head, the thorax is the middle section of an insect's body. It is where the legs and wings (if present) are attached. It contains muscles that help in movement.
Abdomen: The abdomen is the rear part of an insect's body. It contains vital organs such as those for digestion, excretion, and reproduction. It is generally more flexible than the thorax.
Maxillae: The maxillae are a part of the insect's mouthparts and are found on the head. They assist in manipulating food.
Based on the given options, if Part III is a section of an insect's body segmented into three prominent parts, it usually corresponds to the thorax or abdomen. Without the diagram, a precise answer cannot be given, but based on typical labeling, Part III is often referring to the middle segment; hence, the thorax is a likely match.
Ibeere 13 Ìròyìn
Awọn alaye Idahun
The central nervous system (CNS) is a crucial part of the overall nervous system in the body, responsible for processing information and controlling most functions of the body and mind. It comprises the brain and the spinal cord.
1. Brain: The brain is the control center of the CNS. It is responsible for interpreting sensory information, coordinating movement, and managing functions such as thoughts, emotions, and memories. The brain oversees all voluntary and involuntary actions.
2. Spinal Cord: The spinal cord acts like a communication highway, transmitting signals between the brain and the rest of the body. It is essential for reflex actions and relays messages to and from the brain.
Together, the brain and spinal cord make up the central nervous system. Without this system, the body would not be able to respond appropriately to stimuli or maintain homeostasis. Thus, the correct components of the central nervous system are the brain and spinal cord.
Ibeere 14 Ìròyìn
The organisms that adopt swarming as an adaptation to overcome overcrowding are
Awọn alaye Idahun
Among the organisms listed, termites are well-known for adopting swarming as an adaptation to overcome overcrowding.
Here's why:
Swarming in termites is a crucial natural strategy that allows them to efficiently manage their population and ensure the survival and expansion of their colonies.
Ibeere 15 Ìròyìn
Which of the following processes releases oxygen to the atmosphere?
Awọn alaye Idahun
In the context of releasing oxygen to the atmosphere, only one of the processes you've listed does this: photosynthesis. Let me explain it in a simple way.
Photosynthesis is a process carried out by plants, some bacteria, and algae. These organisms use sunlight, carbon dioxide, and water to create their food, which is a form of sugar. As a byproduct, they release oxygen into the atmosphere. During this process, chlorophyll, the green pigment in plant cells, captures light energy, and helps convert it into chemical energy.
None of the other processes release oxygen:
- Respiration is a process in which living organisms, including plants and animals, take in oxygen and use it to convert glucose into energy, producing carbon dioxide and water as byproducts.
- Combustion involves burning substances, typically in the presence of oxygen, usually resulting in the production of carbon dioxide, water, and energy (heat and light). It does not release oxygen; rather, it consumes oxygen.
- Decomposition is the breakdown of dead organic matter by microorganisms. During this process, organic matter is converted back into carbon dioxide, methane, and other compounds, but it does not release oxygen.
So, the process that releases oxygen into the atmosphere is photosynthesis.
Ibeere 16 Ìròyìn
One of the following is an example of discontinuous variation
Awọn alaye Idahun
Discontinuous variation refers to variations where the traits are distinct and categorical, meaning individuals can be grouped into distinct categories with no intermediate states. A good example of **discontinuous variation** from the options provided is **blood group**. This is because blood groups are distinct categories (e.g., A, B, AB, O) and individuals belong to one category without any intermediate states.
In contrast, other traits like **shape of the head**, **body complexion**, and **pointed nose** often show a range of variations that are continuous, meaning these traits can have many intermediate forms and cannot be easily categorized into discrete categories. Therefore, **blood group** is an **example of discontinuous variation** because it consists of clearly defined and non-overlapping categories.
Ibeere 17 Ìròyìn
Which of the following plant is found in the ground layer of a tropical rainforest in Nigeria?
Awọn alaye Idahun
In a tropical rainforest, the forest layers are characterized by distinct types of vegetation. The **ground layer** hosts plants and organisms that typically thrive in low-light conditions due to the dense canopy above. Such layers often consist of mosses, ferns, and small plants that can grow with limited sunlight.
When considering the plants listed:
Thus, the answer is **liverwort**, as it appropriately matches the ecological niche of the **ground layer** in a tropical rainforest.
Ibeere 18 Ìròyìn
If the F1 generation allows for self-pollination, what will be the genotypic ratio of the offspring?
Awọn alaye Idahun
To determine the genotypic ratio of the offspring when the F1 generation allows for self-pollination, first understand the process of Mendelian genetics. In a typical monohybrid cross, let's assume two homozygous parents, one dominant (AA) and one recessive (aa). When these two are crossed, the F1 generation will all have the genotype Aa, which is heterozygous.
If we allow the F1 generation (Aa) to self-pollinate, crossing Aa with Aa, the potential genotypes of the offspring can be determined using a Punnett square:
A | a | |
A | AA | Aa |
a | Aa | aa |
From this Punnett square, you can see the possible combinations:
Thus, the genotypic ratio of the offspring is 1 : 2 : 1, which represents one homozygous dominant (AA), two heterozygous (Aa), and one homozygous recessive (aa).
Ibeere 19 Ìròyìn
Lamarck's theory of evolution is based on the idea of
Awọn alaye Idahun
Lamarck's theory of evolution is based on the idea of the inheritance of acquired traits. According to Lamarck, organisms can change during their lifetime by using or not using certain parts of their body. For example, he suggested that if a giraffe stretches its neck to reach higher leaves on trees, its neck will become longer. Furthermore, these traits that were acquired during an organism's lifetime could then be passed down to its offspring. Thus, the next generation would inherit the longer neck, leading to a gradual evolution of longer-necked giraffes over generations. This theory was one of the earliest ideas about evolution, although it has since been largely superseded by Darwin's theory of natural selection.
Ibeere 20 Ìròyìn
Awọn alaye Idahun
Inbreeding is highly discouraged in humans primarily because it can greatly increase the risk of hereditary diseases. When close relatives, who may share similar genetic traits, have children together, there is a higher probability that both parents carry the same recessive genes. These recessive genes could cause genetic disorders if inherited in pairs. In an outbred population, these recessive genes are less likely to pair up, thereby reducing the risk of such disorders.
Hereditary diseases include conditions like cystic fibrosis, sickle cell anemia, and Tay-Sachs disease. These diseases can cause severe health problems and affect the quality of life of those born with them. The higher genetic similarity between parents who are closely related increases the chances of these diseases manifesting in their offspring.
In addition, inbreeding can also lead to the phenomenon known as "inbreeding depression," which can cause a reduction in fertility, survivability, and growth rates due to the accumulation of deleterious alleles. This can contribute to an increased death rate of newborns or result in other developmental concerns.
In summary, inbreeding increases the likelihood of harmful genetic conditions being expressed and can significantly impact the health and survival of the offspring, which is why it is strongly discouraged in human societies.
Ibeere 21 Ìròyìn
A fruit formed from one flower with many carpels is referred to as
Awọn alaye Idahun
A fruit formed from one flower with many carpels is referred to as an aggregate fruit.
Let me break that down further for clarity: When a single flower contains multiple ovaries (carpels), each of these ovaries can develop into a small fruit. These small fruits collectively form what is known as an aggregate fruit. This means that although the fruit appears to be one single entity, it is actually made up of many small fruits that are clustered together. Each small fruit in the cluster originates from a single ovary of the flower.
An example of an aggregate fruit is a raspberry or a blackberry, where the clustered small fruits can easily be observed.
Ibeere 22 Ìròyìn
The transmission of diseases through contamination of food is an economic importance of
Awọn alaye Idahun
The transmission of diseases through contamination of food is an economic importance primarily related to cockroaches.
Cockroaches are considered pests that thrive in unsanitary environments. They are known to carry various pathogens, such as bacteria, viruses, and parasites, on their bodies and in their droppings. When they come into contact with food, they can contaminate it, leading to foodborne diseases.
This contamination can have several economic impacts:
Therefore, managing and preventing cockroach infestations is crucial to safeguarding public health and protecting economic interests associated with food safety.
Ibeere 23 Ìròyìn
Which of the following evidences of evolution employs the use of radio-isotope dating?
Awọn alaye Idahun
The evidence of evolution that employs the use of radio-isotope dating is fossil records.
Let me explain this further. Fossils are the preserved remains or traces of organisms that lived in the past. Scientists use fossils to understand the history of life on Earth and how species have changed over time. But to make meaningful conclusions, they need to know the age of these fossils.
This is where radio-isotope dating comes into play. Radio-isotope dating, also known as radiometric dating, is a technique used to determine the age of rocks and fossils. It measures the decay of radioactive isotopes in materials.
Here's a simple way to understand it: you can think of radioactive isotopes as tiny clocks contained within rocks and fossils. These isotopes decay at a constant rate over time. By measuring the amount of remaining isotopes and knowing their half-life (the time it takes for half of the isotopes to decay), scientists can calculate how long the isotopes have been decaying. This gives them the age of the fossil or rock, helping to place it in the context of Earth's history.
In conclusion, fossil records are the evidence of evolution that utilize radio-isotope dating to provide a time frame and chronological context for evolutionary events.
Ibeere 24 Ìròyìn
The type of circulatory system found in arthropods and some molluscs is
Awọn alaye Idahun
The type of circulatory system found in arthropods and some molluscs is called an open circulatory system.
In an open circulatory system, the blood does not always travel inside blood vessels. Instead, the heart pumps the blood into open cavities or spaces in the body, and hence the organs are directly in contact with the blood. Unlike a closed system, where blood circulates only within blood vessels, the open system allows the blood to flow freely around tissues before being re-collected and circulated again. This kind of system is common in invertebrates like arthropods (insects, spiders) and some molluscs (like snails and clams).
This approach to circulation is generally less efficient than a closed circulatory system because there is less control over the direction and speed of the blood flow. However, it works well for the metabolic needs of these animals. They do not require the high energy needs of more complex organisms, so this system is well-suited to their lifestyles and environments.
Ibeere 25 Ìròyìn
The changes of living organisms over generation is referred to as
Awọn alaye Idahun
The process by which living organisms change over generations is referred to as organic evolution. This concept explains how species undergo gradual change over long periods of time, which can ultimately result in the emergence of new species. These changes are brought about by mechanisms such as mutation, natural selection, gene flow, and genetic drift. As a result, populations of organisms adapt to their environments and can become better suited to survive and reproduce. The concept of organic evolution is a fundamental principle in biology, as it helps us understand the history of life on Earth and the shared ancestry of all living organisms.
Ibeere 26 Ìròyìn
A common component of blood and lymph is
Awọn alaye Idahun
Blood and lymph are both crucial components of the circulatory and immune systems in the body. One of the key components that is common to both blood and lymph is the white blood cell. Here's how:
White blood cells, also known as leukocytes, play a significant role in defending the body against infections, diseases, and foreign invaders. They are an essential part of the immune system.
In blood, white blood cells circulate through the cardiovascular system and help in identifying and attacking pathogens like bacteria, viruses, and other harmful microorganisms.
In lymph, white blood cells are found in the lymphatic fluid and lymph nodes, where they help filter and trap pathogens, preventing them from spreading further into the body.
Therefore, white blood cells are the common component of both blood and lymph, playing a crucial role in the body's defense mechanisms.
Ibeere 27 Ìròyìn
Energy transfer in plants and animals are in the form of
Awọn alaye Idahun
In both plants and animals, **energy transfer** primarily occurs in the form of **Adenosine Triphosphate (ATP)**. To understand this, let's break it down simply:
1. **What is ATP?** ATP is a molecule that stores and carries energy within cells. Think of it as a small packet or currency of energy that is used to power various cellular processes. The energy is stored in the bonds between the phosphate groups, and when a bond is broken, energy is released to do work in the cell.
2. **How is ATP used in plants?** In plants, ATP is produced during the process of photosynthesis in the chloroplasts. Sunlight energy is captured and used to convert carbon dioxide and water into glucose and oxygen. The light energy is converted into chemical energy in the form of ATP and NADPH. Plants then use ATP to synthesize essential components like glucose, which further fuels various necessary activities of the plant.
3. **How is ATP used in animals?** In animals, ATP is primarily produced during cellular respiration in the mitochondria. Animals consume glucose, and through cellular respiration, they convert it into ATP by using oxygen. This ATP provides the energy needed for various functions such as muscle contraction, nerve impulse propagation, and biosynthetic reactions.
Other molecules like **DNA**, **RNA**, and **GTP** play different roles. DNA stores genetic information, RNA is involved in protein synthesis, and GTP is another energy molecule, but it is primarily used in specific signaling pathways and protein synthesis. ATP remains the main molecule for energy transfer in most cellular activities.
In summary, ATP is the **key energy carrier** in both plants and animals, facilitating essential life processes that require energy.
Ibeere 28 Ìròyìn
In vascular plants, xylem tissue is responsible for
Awọn alaye Idahun
In vascular plants, the xylem tissue is primarily responsible for the transportation of water. The xylem functions like a network of tubes spreading throughout the plant, from the roots up to the leaves. Its main role is to carry water and dissolved minerals absorbed from the soil by the roots to other parts of the plant. This movement of water is crucial for maintaining plant health as it supports essential processes like photosynthesis and nutrient distribution. Unlike other tissues, xylem is specifically adapted for this task, with its elongated, tube-like structures which provide an effective passage for water movement.
Ibeere 29 Ìròyìn
Gaseous exchange takes place through the plasma membrane in
Awọn alaye Idahun
Gaseous exchange is a biological process through which different gases are transferred in opposite directions across a specialized respiratory surface. When it comes to simple organisms, this exchange can occur directly through the plasma membrane. The organism where gaseous exchange takes place through the plasma membrane is the paramecium.
Here is a simple explanation:
In conclusion, paramecium utilizes its plasma membrane for gaseous exchange due to its single-celled structure, allowing direct diffusion of gases.
Ibeere 30 Ìròyìn
The schlerenchyma tissues consist of
Awọn alaye Idahun
Schlerenchyma tissues are a type of plant tissue known for providing structural support. These tissues are composed of cells that are typically dead at maturity. The cell walls of schlerenchyma tissues are thickened with lignin, which makes them rigid and strong. These characteristics help in supporting the plant body and protecting the plant against external mechanical forces.
To clarify, let's consider the types of cells mentioned:
In summary, schlerenchyma tissues consist mainly of dead cells. Their primary role is structural support, making them distinct from tissues composed of living cells, tracheid cells, or meristematic cells.
Ibeere 31 Ìròyìn
The part of the inner ear that is responsible for hearing is
Awọn alaye Idahun
The part of the inner ear that is responsible for hearing is the cochlea.
The cochlea is a spiral-shaped, fluid-filled structure that looks a little like a snail shell. Its primary function is to convert sound waves from the air into electrical signals that can be interpreted by the brain as sound. Here's how it works:
Thus, the cochlea plays an essential role in the process of hearing by transforming sound vibrations into nerve impulses that the brain can understand.
Ibeere 32 Ìròyìn
In glycolysis, glucose is broken down through series of reactions in the presence of enzyme and absence of oxygen to produce
Awọn alaye Idahun
Glycolysis is a biochemical process through which glucose, a six-carbon sugar, is broken down into two molecules of a three-carbon compound called **pyruvic acid** or **pyruvate**. This process occurs in the **absence of oxygen** and is also referred to as anaerobic respiration. During glycolysis, energy stored in glucose is released, and a net gain of **two molecules of ATP (adenosine triphosphate)** is produced, which serves as a direct energy source for cellular activities.
Here is a brief explanation of the main steps involved in glycolysis:
In summary, during glycolysis in the absence of oxygen, glucose is transformed into **pyruvic acid and a net gain of ATP molecules**, making the answer **pyruvic acid + ATP**.
Ibeere 33 Ìròyìn
Loamy soil is characterized by
Awọn alaye Idahun
Loamy soil is characterized by a distinct combination of features that make it particularly favorable for plant growth. It contains a balanced mixture of three types of soil particles: sand, silt, and clay. This combination gives loamy soil its unique properties.
High Humus: Loamy soil is known for having a high content of organic matter, often referred to as humus. Humus is important because it improves soil fertility, provides vital nutrients for plants, and helps retain moisture.
Moderate Porosity: Loamy soil has a structure that provides moderate porosity. This means it can hold water effectively while also allowing excess water to drain away, ensuring that plants have both the water and air they need. It balances water retention and aeration very well.
Because of these characteristics, loamy soil is considered one of the best soils for agriculture and gardening. Therefore, the description that best characterizes loamy soil is high humus and moderate porosity.
Ibeere 34 Ìròyìn
The food nutrient with the highest energy value is
Awọn alaye Idahun
The food nutrient with the highest energy value is lipids, which include fats and oils.
The reason lipids have the highest energy value is due to their chemical structure. They contain long chains of carbon and hydrogen atoms, which can store a significant amount of energy. When these bonds are broken down in the body, they release energy.
In terms of energy measurement, lipids provide about 9 calories per gram, whereas proteins and carbohydrates each provide about 4 calories per gram. Minerals do not provide energy but are essential for other bodily functions.
Therefore, lipids are more energy-dense and offer more energy per gram compared to other nutrients. This is why they are considered the food nutrient with the highest energy value.
Ibeere 35 Ìròyìn
The formation of cilia and flagella in living cells is carried out with the help of
Awọn alaye Idahun
The formation of cilia and flagella in living cells is primarily carried out with the help of centrioles.
In eukaryotic cells, cilia and flagella are long, hair-like structures that extend from the surface of the cell and are responsible for movement. They are made up of microtubules, which are protein structures. The base of a cilium or a flagellum is anchored to a cell by a structure called the basal body.
The basal body is very similar in structure to a centriole. Centrioles are cylinder-shaped organelles found in animal cells and are composed of microtubule triplets. When a cell is ready to produce cilia or flagella, the centrioles migrate to the surface of the cell and become basal bodies by aiding in the assembly and organization of these microtubules.
Therefore, the role of centrioles is crucial because they act as the organizing centers for the microtubule structures that comprise cilia and flagella. Without centrioles, a cell would not be able to form these important structures.
Ibeere 36 Ìròyìn
The part of the kidney where the selective reabsorption takes place is
Awọn alaye Idahun
The part of the kidney where selective reabsorption takes place is the Henle's loop, also known as the Loop of Henle.
Here's a simple explanation:
The kidneys are responsible for filtering blood, removing waste, and balancing bodily fluids. This is accomplished through structures called nephrons, each of which functions like a tiny processing plant. A nephron comprises various parts, including the glomerulus, Bowman's capsule, and the Loop of Henle.
Initially, blood is filtered in the glomerulus, and the resulting fluid then enters the Bowman's capsule. However, this fluid contains essential nutrients and ions that our body needs. Therefore, it must be reabsorbed back into the bloodstream.
The Loop of Henle plays a critical role in this reabsorption process. It creates a concentration gradient that allows water, sodium, chloride ions, and other substances to be reabsorbed selectively into the blood. This ensures that vital nutrients and electrolytes are not lost in the urine.
The Henle's loop is integral in forming concentrated urine, enabling the body to conserve water and important nutrients while still eliminating waste effectively. Thus, it is the site where selective reabsorption primarily occurs.
Ibeere 37 Ìròyìn
One of the ways of controlling Schistosomiasis is by
Awọn alaye Idahun
One effective way of controlling Schistosomiasis is by destroying water snails and water weeds.
Schistosomiasis, also known as bilharzia, is a parasitic disease caused by trematode worms of the genus Schistosoma. The life cycle of these parasites heavily involves freshwater snails, which act as intermediate hosts. Here's how the life cycle works:
By destroying water snails and eliminating water weeds, which can provide habitat for these snails, you interrupt the lifecycle of the parasite. This can significantly reduce the risk of transmission to humans. It is crucial to control snail populations in freshwater bodies where human contact is common.
This method, along with other control measures such as providing access to safe water, improving sanitation, and educating communities about safe water practices, plays a crucial role in reducing schistosomiasis transmission. Importantly, to combat the disease effectively, a combination of approaches is usually necessary.
Ibeere 38 Ìròyìn
Body temperature, thirst and hunger are regulated by
Awọn alaye Idahun
The regulation of body temperature, thirst, and hunger is primarily managed by the hypothalamus. This is a small but crucial part of the brain located just below the thalamus. It plays a key role in maintaining the body's internal balance, known as homeostasis.
Here is a simple breakdown of its functions:
The hypothalamus achieves these regulations by interacting with the endocrine system, releasing hormones that affect various bodily functions. So, if you are thinking of which area of the brain is in charge of these vital processes, the answer is indeed the hypothalamus.
Ibeere 39 Ìròyìn
One of the characteristics of secondary succession is that it
Awọn alaye Idahun
Secondary succession is a process that occurs when an ecosystem that has already been colonized by living organisms is disturbed, but the soil and some of its organisms remain intact. This can happen after events such as forest fires, hurricanes, or human activities like farming. In contrast to primary succession, secondary succession does not start from scratch or a barren surface.
The characteristic of secondary succession is that it starts on an already colonized surface. This means that the area had life before but was disturbed, so the succession process is somewhat quicker since the soil contains seeds, nutrients, and microorganisms that speed up the recovery of the ecosystem. This contrasts with primary succession, which starts on bare and barren surfaces, like rocks or volcanic lava fields, where soil needs to form first.
Ibeere 40 Ìròyìn
Which of the following is a viral disease?
Awọn alaye Idahun
Out of the diseases listed, Measles is a viral disease. Let me explain this simply:
In summary, Measles is the only viral disease among the options provided, as it is specifically caused by a virus, unlike the others, which are caused by bacteria.
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