Waec Biology Past Questions and Answers

Question 1866:

• WAEC 1996

Which of the following is the effect of continuous tillage on an ecological system?

A. Addition of more. humus to the soil
B. Decrease in productivity
C. Increase in yield
D. Improved fertility
E. Prevention of erosion

Question 1867:

• WAEC 1996

The most sensitive part of the retina is called

A. Blindspot
B. Conjuctiva
C. Fovea centralis
D. Choroid coat
E. Sclerotic coat

Question 1868:

• WAEC 1996

Which of the following pairs consists of gametes?

A. Ova and spermatozoa
B. Spores and sporangium
C. Flowers and pollen grains
D. Testes and ovaries
E. Gametophyte and sporophyte

Question 1869:

• WAEC 1996

Which of the labelled structures is the nucleus?

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

Question 1870:

• WAEC 1996

Which of the following labelled structures secretes enzymes which facilitate penetration
of the egg?

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