Biological Classification And System Of Classification Question 332
Question: Contractile vacuole is absent in marine and parasitic protozoa because
Options:
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
Show Answer
Answer:
Correct Answer: C
Solution:
Contractile vacuole is an osmoregulatory organelle.
When the internal and external media are isotonic, there is no necessity of contractile vacuole.
BETA
