Jamb Biology 2021 Past Questions and Answers

Question 26:

• JAMB 2021

The blood vessel which carries blood from the alimentary canal to the liver is the?

A. Hepatic artery
B. Hepatic vein
C. Hepatic portal vein
D. Mesenteric artery

Question 27:

• JAMB 2021

When a Spirogyra cell is immersed in a salt solution more concentrated than its cell sap, it?

A. Remains unchanged
B. Takes tip water and burst
C. Absorbs a little water
D. Loses water and shrivels

Question 28:

• JAMB 2021

The initial volume of water poured into a bag of dry soil was 50ml and the amount that drained through was 35mI.

The percentage water content of the fully soaked soil is, therefore?

A. 46.7
B. 25.0
C. 20.0
D. 30.0

Question 29:

• JAMB 2021

In demonstrating the importance of mineral elements in plants, the culture bottle must be darkened to?

A. Prevent algal growth in culture solution
B. Allow root growth
C. Prevent breakdown of mineral elements
D. Prevents photosynthesis in the root

Question 30:

• JAMB 2021

One of the functions of the xylem is?

A. Strengthening the stem
B. Manufacturing food
C. Reducing loss of water
D. Conducting manufactured food