Waec Biology Past Questions and Answers

Question 706:

• WAEC 2001

A major reason why the red blood cells can survive in the blood is that the

A. Blood plasma and the red blood cells are isotonic
B. Red blood cells are hypotonic to the plasma
C. The red blood cells are hypertonic to the blood plasma
D. The red blood cells receive digested nutrients

Question 707:

• WAEC 2001

Which of the following phenomena affects plants growth in an alkaline soil?

A. Excessive plasmolysis
B. Excessive transpiration
C. Excessive sunlight
D. Poor drainage

Question 708:

• WAEC 2001

A red blood cell haemolyses when placed in a hypotonic solution because

A. It contains haemoglobin
B. The cytoplasm is less dense
C. The cell lacks a wall
D. Its pigment has a high affinity for water

Question 709:

• WAEC 2001

Which bf the following structures are visible in the cell of a plant during mitosis?

A. Centrioles, chromatids and nucleolus
B. Homologous chromosomes, nuclear membrane and spindle fibres
C. Cell wall, centrioles and chromatids
D. Chromosomes, nuclear membrane and centromere

Question 710:

• WAEC 2001

Display is a phenomenon which occurs when an animal is

A. Ready for mating
B. Fighting to defend itself
C. Approaching puberty
D. Chasing away an intruder