Waec Biology Past Questions and Answers

Question 171:

• WAEC 1991

Puddles,ponds, rivers, lakes, seas and ocean are grouped together as

A. Ecosystem
B. Biosphere
C. Terrestrial habitat
D. Marine habitat
E. Aquatic habitat

Question 172:

• WAEC 1991

Which of the following would be the primary producer in a food chain?

A. Saprophytes
B. Herbivores
C. Carnivores
D. Green plants
E. Parasites

Question 173:

• WAEC 1991

fewer number of trees is characteristic of the Savanna zones of Nigeria because

A. There is too much sunlight
B. There is limited amount of rainfall
C. They are usually exposed to grazing animals
D. They are covered by high mountains
E. The farmers always engage in bush-burning

Question 174:

• WAEC 1991

The number of individuals in a habitat in relation to the unit space available to each organism is referred to as the

A. Birth rate
B. Density
C. Mortality
D. Frequency
E. Dispersion

Question 175:

• WAEC 1991

which of the following will be the effect of waterlogged top soil on the roots of plants?

A. The waterlogged soil will stimulate rapid growth of roots
B. There will be abundant supply of air for the growth of roots
C. The roots will absorb water i rapidly
D. There willl be an accumulation of plant nutrients
E. The roots will be starved of air