Jamb Biology 2007 Past Questions and Answers

Question 6:

• JAMB 2007

One adaptation shown by hydrophytes in freshwater habitats is the

A. Leaves reduced to spines
B. Poor development of roots and xylem tissues
C. Waxy cuticle on shoot surface
D. Well developed roots and supporting system

Question 7:

• JAMB 2007

A crucible of 5 g m weighed 10 gm after filling with fresh soil. it is then heated in an oven at 100°c for 1 hour. After cooling in a desiccator, the weight was 8 gm. The percentage of water in the soil is

A. 80%
B. 60%
C. 20%
D. 40%

Question 8:

• JAMB 2007

The highest level of ecological organization is the

A. Ecosystem
B. Population
C. Biosphere
D. Niche

Question 9:

• JAMB 2007

The mangrove swamp in Nigeria is restricted to the

A. Sahel savana
B. Sudan savanna
C. Guinea savanna
D. Tropical rain forest

Question 10:

• JAMB 2007

A biotic factor which affects the distribution and abundance of organisms in a terrestrial habitat is

A. Temperature
B. Competition
C. PH
D. Light