Jamb Biology 2009 Past Questions and Answers

Question 21:

• JAMB 2009

A marine protozoan is likely to have no contractile vacuole mainly because the cytoplasm is

A. Isotonic to sea water
B. Hypotonic to sea water
C. Hypertonic to sea water
D. Impervious to sea water

Question 22:

• JAMB 2009

In fresh water marshes and swamps, the most important abiotic factors that organisms have to adapt to is

A. Nature of substratum
B. High salinity
C. High temperature
D. Low pH

Question 23:

• JAMB 2009

Which of the following biomass could be characterized by very low rainfall,cold nights, hot days, and fast blooming plants?

A. Northern guinea savanna
B. Sounthern guinea savanna
C. Tropical desert
D. Montane forest

Question 24:

• JAMB 2009

Mass of crucible = 10g
Mass of crucible and soil before heating = 29g
Mass of a crucible and soil after heating = 18g
From the information above, determine the percentage of water in the given soil sample?

A. 20%
B. 25%
C. 40%
D. 50%

Question 25:

• JAMB 2009

I. Onchocerciasis
II. Schistosomiasis
III.Salmonellosis
IV. Meningitis
which of the diseases listed above are associated with water?

A. I and II only
B. II, III and IV
C. I, II and III
D. II and IV