Biology WAEC

The process that brings about the shrinking of a spirogyra cell when placed in a strong solution is?

A. osmosis B. autolysis C. plasmolysis D. diffusion Correct Answer: Option C - plasmolysis

2 years ago

The region of a plant stem in which cells divide to increase its diameter is?

A. cambium B. phloem C. xylem D. collenchyma Correct Answer: Option A - cambium

2 years ago

The total number of caudal vertebrae in animals X and Y is 4 and 27 respectively. The animals are likely to be?

A. fish and human B. toad and rat C. toad and fish D. humans and rat Correct Answer: Option D…

2 years ago

Which of the following blood components has the greatest affinity for oxygen and carbon (IV) oxide?

A. Lymphocyte A. Thrombocyte B. Erythrocyte C. Blood plasma Correct Answer: Option B - Thrombocyte

2 years ago

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

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

2 years ago

Which of the following statements about mitosis is not correct?

A. chiasmata are not formed B. Bi-valents are not formed C. It does not lead to variation D. Four daughter…

2 years ago

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

A. lead to agglutination B. facilitate dissolution of clot C. have no effect on blood composition D. change the blood…

2 years ago

Plants suitable for experiments in genetics must not?

A. produce numerous seeds within a short time B. have a small number of chromosomes C. have a relatively short…

2 years ago

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

A. it is caused by sex-linked genes B. it is more common in males than in females C. two sickle…

2 years ago