Jamb Biology 2004 Past Questions and Answers

Question 26:

• JAMB 2004

Nervous control differs from hormonal control in that the former

A. Involves only chemical transmision
B. Is a lower process
C. Produces short-term changes
D. Has no specific pathway

Question 27:

• JAMB 2004

If a nursing mother is not producing enough milk, her hormonal system is probably deficient in

A. Prolactin
B. Testosterone
C. Thyroxin
D. Insulin

Question 28:

• JAMB 2004

The two keys cation involved in the action potential of nervous transmissions are

A. Na⁺ an Fe²⁺
B. Mg²⁺ and K⁺
C. Na⁺ and K⁺
D. Fe²⁺ and Mg²⁺

Question 29:

• JAMB 2004

A caterpillar and an aphid living in different parts of the same plant can be said to

A. Occupy the same ecological niche
B. Be in different habitat
C. Occupy different ecological niche
D. Be in the same microhabitats

Question 30:

• JAMB 2004

Ecological ZoneTemperature (^oC)Rainfall (mm)I45300II322000III302200IV15800
From the table above high relative humidity will be expected in zones

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