Waec Biology 2005 Past Questions and Answers

Question 11:

• WAEC 2005

Which of the following pairs of organisms are photosynthetic?

A. Amoeba and Paramecium
B. Volvox and Rhizopus
C. Chlamydomonas and Euglena
D. Nostoc and Plasmodium

Question 12:

• WAEC 2005

Which of the following pairs of organisms exist as colonies?

A. Obelia and Euglena
B. Pandorina and Volvox
C. Chlamydomonas and Amoeba
D. Hydra and Spirogyra

Question 13:

• WAEC 2005

Which of the following Best explains why It is difficult to see clearly in dim light?

A. Initially the eyes cannot operate when the light is dim
B. The choroid reflect all the light that enters the eye
C. Too little light reaches the retina and so the cones may not be stimulated at all
D. Dim light causes the pupil to close up so that not much light enters the eye

Question 14:

• WAEC 2005

In active transport, molecules move against a concentration gradient, therefore

A. Molecules move from a region of low concentration to a region of high concentration
B. Molecules move from a region of high concentration to a region of low concentration
C. The concentration gradient has little effect on the movement of molecules
D. Molecules force their way through special channels

Question 15:

• WAEC 2005

Which of the following substance pass through the root cell membrane by osmosis?

A. Cell sap
B. Carbon dioxide
C. Oxygen
D. Water