When a freshwater protozoan, possessing a contractile vacuole, is placed in a glass containing marine water, the vacuole will?
561 When a freshwater protozoan, possessing a contractile vacuole, is placed in a glass containing marine water, the vacuole will?
Biology
Biological Classification
NEET
Moderate
2026
Question
Options
A) Increase in number
B) Disappear
C) Increase in size
D) Decrease in size
Show Correct Answer
b
View Detailed Solution
When freshwater protozoans are placed in marine water, i.e., hypertonic water, the contractile vacuoles disappear because the process of endosmosis does not happen and thus, water does not come in the protoplasm.