Waec Biology 1995 Past Questions and Answers

Question 11:

• WAEC 1995

Higher organisms use a transport system and not diffusion only to distribute nutrients because

A. The ratio of their surface area to volume is small
B. Metabolic waste products diffuse to the surface of the organisms
C. The rate at which nutrients and other substances diffuse increases
D. Substances to be transported move shorter distances to reach the numerous cells
E. The internal structures of the organisms are in direct contact with the environment.

Question 12:

• WAEC 1995

In complex food relationships in a community, the primary, secondary and tertiary consumers are referred
to as

A. Symbionts
B. Omnivores
C. Heterotrophs
D. Autotrophs
E. Carnivores

Question 13:

• WAEC 1995

The cell membrane of a cell is said to be semi-permeable because

A. It allows only large molecular substances to pass through it into the cell
B. It is actively involved in energy production in the cell
C. It actively allows all substances to pass through it by diffusion
D. It is actively selective in allowing substances pass through it
E. Fatty acids are only the building blocks of the membrane

Question 14:

• WAEC 1995

The function of the part labelled I is

A. Controlling water loss
B. Trapping solar energy
C. Absorbing water
D. Storing sugar
E. Transporting sugar

Question 15:

• WAEC 1995

The part labelled ll is the

A. Stoma
B. Palisade cell
C. Spongy cell
D. Guard cell
E. Epidermal cell.