Waec Biology Past Questions and Answers

Question 641:

• WAEC 2000

Which of the following statements is incorrect about diffusion?

A. It involves degradation of soluble particles in solvents
B. It occurs mainly in gaseous and liquid media
C. No membrane is needed to effect the movement of molecules
D. Molecules move from region of lower concentration to that of higher concentration.

Question 642:

• WAEC 2000

In which of the following organisms is ammonia excreted as a waste product?

A. Man
B. Bird
C. Amoeba
D. Spirogyra

Question 643:

• WAEC 2000

The following are the functions of supporting tissues in plant except

A. Rigidity
B. Flexibility
C. Strengthening
D. Secretory

Question 644:

• WAEC 2000

Which of the following organisms has the largest surface area-to-volume ratio?

A. Man
B. Earthworm
C. Amoeba
D. Grasshopper

Question 645:

• WAEC 2000

Which of the following plant parts does not perform supportive function?

A. Parenchyma, xylem and . collenchyma
B. Epidermis, sclerenchyma and xylem
C. Parenchyma, collenchyma and sclerenchyma
D. Sclerenchyma, xylem and collenchyma