WAEC SSCE - Biology - 2021 (Objective)

The diagram above is an illustration of the longitudinal section of a mammalian organ. Study it and answer this question.

Which of the labeled parts is the cortex?

Which of the following hormones is suddenly secreted into the bloodstream of a frightened person?

The process that takes place at the light stage of photosynthesis is?

The illustration below is a food chain.

Grass→grasshopper→domestic fowl→hawk

What would happen if the population of domestic fowl decreases?

The level of organization of the organism is

Which of the following factors is not necessary for photosynthesis?

Plants and animals of an ecosystem make up a?

The diagram above is an illustration of the growth of a plant in a water culture. After a few days, the solution turned green and the plant died. Use this to answer this question.

The death of the plant was likely caused by?

The structure labelled I is associated with

Which of the following features is a characteristic of aquatic plants possession of ?

The temperature control centre in mammals is located in the?

The diagram above is an illustration of a type of eye defect in humans. Study it and answer this question.

The eye defect can be corrected by the use of?

The diagram above is an illustration of a type of eye defect in humans. Study it and answer this question.

The eye defect illustrated in the diagram is?

The fruit that has the illustrated sections is a

A mixture of blood with antigen A and blood containing antibody a will?

In humans, pointed eyebrows (B) is a dominant trait over smooth eyebrows (b). A student and the mother have smooth eyebrows while the father has pointed eyebrows. What is the genotype of the father?

Which of the following statements about mitosis is not correct?

Which of the following organisms does not undergo incomplete metamorphosis?

Radius and ulna are bones of the?

The diagram above is an illustration of the growth of a plant in a water culture. After a few days, the solution turned green and the plant died. Use this to answer this question.

What precaution should have been taken to prevent the solution from turning green?

A woman with Rhesus negative blood group was advised not to marry a man with Rhesus positive blood group because

Which of the following behaviours is correctly matched with the corresponding diseases?

The organism belongs to the Phylum

Natural selection arises as a result of?

The diagrams above are illustrations of types of comb found in domestic fowl. Study them and answer this question.

The types of comb show ?

Which of the following statements is not Lamarck's postulate on evolution?

Which of the following organelles is common to both plant and animal cells

The blood vessel which carries blood from the alimentary canal to the liver is the

Rabbits cannot survive in an aquatic habitat because they have 

The sections in X and Y respectively, are

Plants suitable for experiments in genetics must not 

Endangered species are organisms that are?

Which of the following statements about sickle cell anaemia is correct?

An association between living organisms in which one organism lives on and feeds at the expense of the other organism is known as?

The diagram above is an illustration of the longitudinal section of a mammalian organ. Study it and answer this question.

What is the main function of the organ?

Offspring formed by sexual reproduction exhibit more variation than those formed by asexual reproduction because 

An enzyme reaction may begin to decline when?

The diagram above is an illustration of the foot of an animal.

The adaptation of this type of foot is that it is?

Which of the following organisms exhibits division of labour?

Autotrophic nutrition is a process whereby an organism obtains food 

How many gametes are produced in the pollen grain of a flowering plant before fertilization?

A plant cell placed in a solution with a higher water potential will

The diagrams above are illustrations of types of comb found in domestic fowl. Study them and answer this question.

Which factor is most likely responsible for the various types of comb?

Which of the following statements about the structure labeled III is correct?

The following organisms are examples of carnivorous plants except.

The structure labeled II is the

Which of the following practices is a wildlife conservation method?

Detoxification of urea takes place in the?

When a large number of organisms share limited resources, the result is?

Which of the following resources cannot be conserved?