WAEC SSCE - Biology - 2018 (Objective)

Which of the following dental formulae represents the dentition in rabbits?

The diagram above is an illustration of one of the theories of evolution. Who proposed the theory in the illustration?

What level of organization is Spirogyra?

Which of the following instruments is used to determine the turbidity of water?

Which of the following disease ic caused by a bacterium?

The exchange of genes between homologous chromosomes is called

Which of the following is NOT an excretory product of animals?

The streaming movement of cytoplasm within the Paramecium is known as

A plant cell has 14 chromosomes prior to mitosis. What is the number of chromosomes in the daughter cells?

In an ecosystem, the least efficient energy transfer link is from the

The thyroid gland is found at the base of the

Which of the following statements is true about arthropods?

The diagram above is an illustration of organisms in an air-tight aquarium.The most important factor needed by the organisms is

Xerophytes have the following characteristics aimed at conserving water except

Which of the following is not a social insect?

In evolution, fossils are naturally preserved in

The diagrams above are illustrations of the inheritance of coat colour in mice. J, K, L, M and N are parents. The cross between two parent mice gave rise to offspring P, Q, R and S. Which of the offspring are all homozygous?

Active transport differs from diffusion in that active transport 

The ascent of water in tall trees is mainly due to 

The structures for gaseous exchange in breathing roots are

Two unconscious patients X and Y whose blood group genotypes are AO and AB respectively were transfused with the blood from the same donor . Patient X immediately showed signs of difficulty in breathing while patient Y showed no negative reaction.

Patients X and Y were likely transferred with blood of genotype

The theory supports

Ultrafiltration in the kidney takes place in the

The most important factor(s) that influence(s) the ecological niche of an organism is/ are the

The odontoid process is found on the

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

Which of the following statements would be a correct observation at the end of the experiment? Water moves

The scientist who introduced binomial nomenclature in the classification of organisms was

Which of the following practices may lead to infection of the eye? Use of

One major difference between plant and animals nutrition is the ability of plants to synthesize

The chemical bond that holds the bases of the two strands of DNA together is

The source of energy required by plants during food production is

The diagrams above are illustrations of an experimental set-up to demonstrate a type of tropic response in plants. The type of response demonstrated is

Which of the following structures would carry out cellular respiration? A

Two unconscious patients X and Y whose blood group genotypes are AO and AB respectively were transfused with the blood from the same donor . Patient X immediately showed signs of difficulty in breathing while patient Y showed no negative reaction.

What should the hospital have done to prevent X from showing the symptom described above? Patient X should have

The duodenum of a person was surgically removed. Which of the following substances would have their digestion affected?

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

In the diagram above, the larva is also known as

The diagram above is an illustration of the life cycle of an insect. The adult fly in this cycle is called

The greatest contribution to genetic studies was made by 

Which of the following statements about the response of neurones to stimulus is correct?

Genes that remain linked are those

Conservation of wildlife is necessary mainly because 

Which of the following organelles is found only in plant cells?

An example of homeostasis in living organisms is

By what process is starch converted into maltose?

When large numbers of organisms share limited space and resources, the immediate result is

The conclusion drawn from the experiment in the diagram above is that

The diagram above is an illustration of an experimental set-up to demonstrate a property of soil. The property of soil demonstrated is