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Question 1 Report
The conclusion drawn from the experiment in the diagram above is that
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Question 2 Report
The most important factor(s) that influence(s) the ecological niche of an organism is/ are the
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The most important factor(s) that influence(s) the ecological niche of an organism is/are the competition for food and space. Ecological niche refers to the role and position of a species within its habitat. It encompasses all the interactions between the species and its biotic and abiotic environment. Competition for resources such as food, water, and space is a major factor that shapes the ecological niche of an organism. The availability of these resources determines the survival and growth of a population, as well as the interactions between different species in the ecosystem. Therefore, the competition for food and space is a crucial factor that shapes the ecological niche of an organism.
Question 3 Report
In evolution, fossils are naturally preserved in
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Fossils are naturally preserved in rocks. When a plant or animal dies, its body may become buried in sediment, such as sand or mud. Over time, more layers of sediment can accumulate on top, which can compress and harden the lower layers into rock. As the body decays, minerals from the surrounding sediment can seep into the bones or other hard parts, replacing the organic material with rock-like minerals. This process is called fossilization, and it can preserve the remains of the organism for millions of years. Later on, erosion and weathering can expose these fossils, allowing us to study and learn about the organisms that lived long ago.
Question 5 Report
A plant cell has 14 chromosomes prior to mitosis. What is the number of chromosomes in the daughter cells?
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A plant cell has 14 chromosomes prior to mitosis, but the number of chromosomes in the daughter cells depends on the type of cell division. During mitosis, the cell duplicates its chromosomes and then separates them equally into two identical daughter cells. This means that each daughter cell will receive the same number of chromosomes as the parent cell. So, after mitosis, each daughter cell will also have 14 chromosomes, the same as the parent cell. However, in other forms of cell division such as meiosis, the number of chromosomes in the daughter cells can be different from the parent cell. But for mitosis, the number of chromosomes in the daughter cells is the same as the parent cell.
Question 6 Report
The diagram above is an illustration of organisms in an air-tight aquarium.The most important factor needed by the organisms is
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Question 7 Report
Which of the following statements would be a correct observation at the end of the experiment? Water moves
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Question 8 Report
A seedling was made to stand in a solution of red ink for three hours and a transverse section of the stem was examined under the microscope. The process being investigated was
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The process being investigated in this experiment is the ascent of water through the xylem. By placing the seedling in a solution of red ink, the red dye is able to travel up the xylem vessels along with the water. When a transverse section of the stem is examined under a microscope, the red dye can be seen in the xylem vessels, showing the path taken by water through the plant. This process is also known as transpiration, where water evaporates from the leaves and creates a negative pressure, which draws water up through the roots and into the xylem. The study of this process is important for understanding how plants transport water and nutrients from the roots to the rest of the plant.
Question 9 Report
An association between living organisms in which one lives on and feeds at the expense of the other is known as
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The association between living organisms in which one lives on and feeds at the expense of the other is called parasitism. In this relationship, one organism (the parasite) benefits while the other organism (the host) is harmed. The parasite lives on or within the host and uses its resources for food and shelter. Examples of parasites include tapeworms, lice, and mosquitoes.
Question 10 Report
Active transport differs from diffusion in that active transport
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Active transport differs from diffusion in that active transport allows the movement of substances against the concentration gradient. Diffusion is the process by which molecules move from an area of high concentration to an area of low concentration. This is driven by the natural tendency of molecules to distribute evenly in a system. Active transport, on the other hand, requires energy to move substances against the concentration gradient, from an area of low concentration to an area of high concentration. This process is important in cells because it allows the cell to take in nutrients, eliminate waste, and maintain a balance of ions and other substances inside and outside the cell. Therefore, active transport differs from diffusion in that active transport allows the movement of substances against the concentration gradient.
Question 11 Report
Ultrafiltration in the kidney takes place in the
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Ultrafiltration in the kidney takes place in Bowman's capsule. Bowman's capsule is a cup-shaped structure located in the outer part of the kidney, called the cortex. It surrounds a cluster of blood vessels called the glomerulus. The glomerulus and Bowman's capsule together form a structure called the renal corpuscle. During ultrafiltration, blood from the glomerulus flows into Bowman's capsule. The glomerulus is made up of a network of capillaries with very small pores. These pores allow small molecules such as water, salts, and waste products to be filtered out of the blood and into the Bowman's capsule. The larger molecules such as proteins and blood cells cannot pass through the pores and remain in the bloodstream. The filtered fluid in Bowman's capsule is called the glomerular filtrate. It contains water, salts, glucose, and other small molecules. This filtrate then passes through the rest of the nephron, where it is further processed and modified before being excreted as urine. So, in summary, ultrafiltration in the kidney takes place in Bowman's capsule, where small molecules are filtered out of the blood and into the nephron to form the glomerular filtrate.
Question 12 Report
The thyroid gland is found at the base of the
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The thyroid gland is a part of the endocrine system, and it is located in the neck, specifically at the base of the neck. The gland is butterfly-shaped, with two lobes on either side of the trachea (windpipe) and connected by a thin strip of tissue called the isthmus. It produces hormones that regulate metabolism and other bodily functions.
Question 13 Report
The exchange of genes between homologous chromosomes is called
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The exchange of genes between homologous chromosomes is called crossing over. During meiosis, which is the process by which cells divide to form gametes, homologous chromosomes pair up and exchange segments of their genetic material. This exchange occurs at specific points called chiasmata, which are where the chromosomes break and rejoin with each other. Crossing over can result in the exchange of alleles, which are alternative versions of a gene, between the homologous chromosomes. This can lead to the production of new combinations of alleles that were not present in either parent, which contributes to genetic diversity. Back cross and test cross are different types of breeding experiments, while mutation refers to a change in the DNA sequence that can arise spontaneously or be induced by environmental factors.
Question 14 Report