Question Detail

ZOO 101 ZOO 101 Past Questions Objective Question

Question

How do protists primarily excrete metabolic wastes?
Options
A Through nephridia
B Through diffusion or active transport across cell membranes
Correct Answer
C Through Malpighian tubules
D Through contractile vacuoles only
Correct Answer

Option B is the correct answer.

Detailed Explanation

Protists excrete wastes like carbon dioxide, ammonia, and mineral salts primarily through diffusion or active transport across their cell membranes due to their small size and large surface area-to-volume ratio.

Hint

These single-celled organisms rely on simple diffusion and membrane transport.

Question Info