Jamb Biology 2023 Past Questions and Answers

Question 36:

• JAMB 2023

Which of the following is the primary organ involved in gas exchange during respiration in humans?

A. Diaphragm
B. Bronchi
C. Lungs
D. Trachea

Question 37:

• JAMB 2023

Which gland is responsible for producing the hormone insulin?

A. Thyroid gland
B. Pituitary gland
C. Pancreas
D. Adrenal gland

Question 38:

• JAMB 2023

Most fishes do not sink in water because of the presences of:
I. swim bladder
II. air bladder
III. air sacs
IV. air in spongy bones

A. II and III are correct
B. I and II are correct
C. I, II, III and IV are correct
D. III and IV are correct

Question 39:

• JAMB 2023

In monohybrid inheritance, if an organism carries two different alleles for a particular gene, it is called:

A. Homozygous
B. Dominant
C. Heterozygous
D. Recessive

Question 40:

• JAMB 2023

What is the tissue responsible for transporting water and minerals from the roots to the rest of the plant?

A. Xylem
B. Epidermis
C. Parenchyma
D. Phloem