Waec Biology 2020 Past Questions and Answers

Question 46:

• WAEC 2020

The diagram above is an illustration of the longitudinal section of a plant organ. Study to answer the question below.


Food is stored in the part labeled

A. I
B. II
C. III
D. IV

Question 47:

• WAEC 2020

The diagram below is an illustration of the longitudinal section of a plant organ. Study it and answer the question below;

The plant is a

A. Stem tuber
B. Bulb
C. Stolon
D. Runner

Question 48:

• WAEC 2020

The diagram below is an illustration of the longitudinal section of a plant organ. Study it and answer the question below;

The part labeled ! is the

A. Apical bud
B. Scale leaf
C. Adventitious root
D. Fleshy leaf

Question 49:

• WAEC 2020

Which of the following materials is not a living semi-permeable membrane?

A. Pig's bladder
B. Unripe pawpaw fruit
C. Yam tuber
D. Sheet of cellophane

Question 50:

• WAEC 2020

In an experiment, mould and yeast cells were transferred into an environment with low oxygen concentration. After a few days, the mould dies while the yeast cells did not. Which of the following statements best explains the following observation.

A. The yeast cells carried out photosynthesis while the mould did not
B. Photosynthesis does not take place in the absence of oxygen
C. Respiration can take place in yeast cells in the absence of oxygen
D. Respiration does not occur in the mould