FORM AND FUNCTIONS - Jamb Biology Past Questions and Answers

Question 1171:

• JAMB 2021

Blood circulation in a mammal is said to be double because?

A. It passes twice through the heart in a complete circuit
B. It moves in both arteries and veins
C. It circulates in both the heart and other organs
D. The heart contains auricles and ventricles

Question 1172:

• JAMB 2021

I. Stomata --> Spirogyra
II. Alveoli --> Earthworm
III. Malpighian tubule -> Mammal
IV. Contractile vacuole -> Protozoa

Which of the above structures is correctly matched with the organisms in which it is found?

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

Question 1173:

• JAMB 2021

The sequence of the one-way gaseous exchange mechanism in a fish is?

A. Mouth --> operculum -> gills
B. Mouth -> gills > operculum
C. Operculum > gills -> mouth
D. Gills -> operculum --> mouth

Question 1174:

• JAMB 2021

The two key cations involved in the action potential of nervous transmissions are?

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

Question 1175:

• JAMB 2021

Which of the following produces both hormones and enzymes?

A. Ileum
B. Pancreas
C. Gall bladder
D. Kidney