Waec Biology Past Questions and Answers

Question 2001:

• WAEC 2020

The table below shows the number of some organisms in habitats W and Y. Study it to answer the question below;
Number in the habitat

Organism
	habitat W	habitat Y
Plankton	126	0
Antelope	0	51
Water flea	10	0
Tilapia	23	0
Lion	0	6
Frog	6	0
Grass	0	250

The number of lions and antelops in habitat Y shows that the lion

A. Is the prey while the antelope is the predator
B. Is the predator while the antelope is the prey
C. And the antelope are preys to each other
D. And the antelopes are predators

Question 2002:

• WAEC 2020

The diagram below is an illustration of a part of a flower. Study it and answer the question below.

The part labeled II is the

A. Unfused stigma
B. Fused style
C. Fused ovaries
D. Unfused anther

Question 2003:

• WAEC 2020

The reagent used in testing for carbon (IV) oxide is

A. Copper sulphate solution
B. Lime water
C. Hydrochloric acid
D. Sodium hydroxide solution

Question 2004:

• WAEC 2020

Oxygen comes out of the stomata during photosynthesis through the process known as

A. Diffusion
B. Transpiration pull
C. Osmosis
D. Active transport

Question 2005:

• WAEC 2020

The first stable product of photosynthesis is

A. Starch
B. Fructose
C. Glucose
D. Sucrose