Question

Contractile vacuole is absent in marine and parasitic protozoa because
A) Excretory products are not found
B) Hypertonic condition of internal and external medium
C) Isotonic condition of internal and external medium
D) Excretion is absent

Answer 1

heyy,

the answer is option A

hope helps

Answer 2

ANSWER:

Contractile vacuole is an essential and important part or organelle of marine and parasitic protozoa because excretion is absent.

EXPLANATION:

The primary purpose osmoregulation for maintaining ample amount of water and electrolyte inside the organism. Its a process done by contractile vacuole and is essential for these organisms because it helps them from bursting and dying.

The osmoregulation through contractile vacuole is a constant process which occurs in certain seconds according to the species.