JAMB UTME - Biology - 1984

Denitrifying bacteria in nature liberate gaseous nitrogen directly from

Maelezo ya Majibu

If a handful of soil is shaken with water and left to settle, the soil particles will settle from light to heavy particles as follows

Maelezo ya Majibu

Spirogyra reproduces vegetatively by

Maelezo ya Majibu

Spirogyra reproduce using sexual or asexual reproduction methods. The process of reproduction varies depending on species of spirogyra. In vegetative varieties, reproduction occurs through the process of fragmentation, which involves the transformation of spirogyra through intercalary mitosis to produce new filaments.

How many nuclei are found in pollen tube during fertilization?

Maelezo ya Majibu

Which of the following is NOT regarded as a pollutant on land or in the air?

Maelezo ya Majibu

Pepsin is a digestive enzymes which breaks

Maelezo ya Majibu

The character-producing factors in living organisms are

Maelezo ya Majibu

Heat produced in tissue respiration in plants is

Maelezo ya Majibu

The process of soil erosion is usually from

Maelezo ya Majibu

Which of the following types of vertebrae occur in equal numbers in the rabbit, rat and man?

Maelezo ya Majibu

Which of the following cell constituents is NOT common in both plants and animals?

Maelezo ya Majibu

A flowering plant is monoecious if

Maelezo ya Majibu

The axial skeleton of a mammal does not include the bones of the

Maelezo ya Majibu

The male toad differs from the female by having

Maelezo ya Majibu

Which of the following is NOT a waste product of plants?

Maelezo ya Majibu

Plants need to excrete excess carbon dioxide and oxygen. Carbon dioxide is a waste product of aerobic respiration in plant cells. Oxygen is a waste product of photosynthesis

The transect method can be used in ecology to show the

Maelezo ya Majibu

Blood clotting is initiated by

Maelezo ya Majibu

Spirogyra and mucor can be grouped together as Thallophyta because

Maelezo ya Majibu

The dorsal and anal fins of fish are used for

Maelezo ya Majibu

Which of the following is INCORRECT? The prothallus of a fern

Maelezo ya Majibu

A man with normal haemoglobin (AA) marries a woman who has sickle-cell haemoglobin (SS). They have a child who has a sickle-cell trait. Which of the following genotypes could be associated with the child’s haemoglobin?

Maelezo ya Majibu

The removal of a man’s pancreas by surgical operation can affect only the digestion of

Maelezo ya Majibu

Which of the following statements is NOT true of the piliferous layer of root? It

Maelezo ya Majibu

Anaerobic respiration in yeast produces

Maelezo ya Majibu

Osmosis can be defined as the movement of

Maelezo ya Majibu

The parts used by the tapeworm to fasten itself to the host’s intestine are the

Maelezo ya Majibu

The presence of a diastema in the jaw bone indicates that the mammal lacks the teeth suitable for

Maelezo ya Majibu

Mosses, liverworts and ferns can be grouped together because they

Maelezo ya Majibu

The mouth parts of the housefly are adapted for

Maelezo ya Majibu

House flies can be easily identified by the four dark, longitudinal stripes on top of the thorax, or middle body region. They vary in length from l/8-l/4 of an inch. Their mouth parts are adapted for sponging up liquids; they cannot bite. These flies can only ingest liquid food. They feed on attractive solid food by regurgitating saliva on it. The saliva liquifies the solid material which is then sponged up with the proboscis. They require water since they are continually salivating and voiding liquids. Fly specks seen on many surfaces visited by house flies are the excreted wastes.

Underground stems which grow horizontally through the soil are

Maelezo ya Majibu

Green plants are important in the ecosystem because they are

Maelezo ya Majibu

The mammalian organ through which nourishment and oxygen diffuse into a developing embryo is called

Maelezo ya Majibu

The young chick is formed from

Maelezo ya Majibu

Which of the following groups of factors is completely abiotic?

Maelezo ya Majibu

Exoskeleton is NOT found in the

Maelezo ya Majibu

Which parts provide food for the developing chick?

Maelezo ya Majibu

A mixture of mercurous and mercuric nitrates is added to a food substance. A white precipitates is formed which on gentle heating turns red. The food substance is

Maelezo ya Majibu

An anemometer is an instrument for measuring

Maelezo ya Majibu

Which of the following invertebrates does NOT possess antennae?

Maelezo ya Majibu

Which of the following statement is NOT true of enzymes? They

Maelezo ya Majibu

Which of the following sequences represents process of blood clothing? 1. Fibrins forms a network of threads 2. Red blood cells are caught and clot is formed 3. Fibrinogen in plasma changes into fibrin 4. Blood is exposed to air

Maelezo ya Majibu

Which of the following lists of diseases, their causes and transmission is CORRECT?

Maelezo ya Majibu

Leaching is

Maelezo ya Majibu

Normally the flow of blood is NEVER from

Maelezo ya Majibu

Fehling's solution will readily change colour from blue to reddish colour when it is

Maelezo ya Majibu

If an animal is very active and has good muscular control, it is likely to have well-developed

Maelezo ya Majibu

Which of the following adaptations is NOT concerned with the flight of birds?

Maelezo ya Majibu

The structure above represents a quill feather. The structure labelled 'M' is the

Maelezo ya Majibu

Erosion can be reduced along shape by

Maelezo ya Majibu

In the Burret test, some protein was mixed with sodium hydroxide solution. Which of the following chemicals should be added to the mixture for a positive results?

Maelezo ya Majibu