Q22 / 200 · NEET 2004 · Botany

When a fresh-water protozoan possessing a contractile vacuole, is placed in a glass containing marine water, the vacuole will:

A
increase in number
Correct answer
B
disappear
C
increase in size
D
decrease in size.

Solution

Contractile vacuole is involved in osmoregulation. When a cell is placed in marine water (hypertonic solution), the water inside the cell (vacuole) rushes out, disappearing the vacuole.

Hence, the correct answer is option: 'B'.

More Transport in Plants Questions

In the given figure, which component has thin outer walls and highly thickened inner walls?2024Transpiration
Which of the following helps in maintenance of the pressure gradient in sieve tubes?2024 (Re-NEET)Long Distance Transport of Water
Given below are two statements: Statement I: The forces generated by transpiration can create pressures sufficient to lift a xylem sized col2023 (All India)Transpiration
Movement and accumulation of ions across a membrane against their concentration gradient can be explained by:2023 (All India)Means of Transport
Match List I with List II: List I List II A.Cohesion I. More attraction in liquid phase B. Adhesion II. Mutual attraction among water molecu2023 (All India)Transpiration
Identify the correct statements regarding Mass flow hypothesis. (A) Mass flow is faster than diffusion. (B) Mass flow is the result of press2023 (Manipur)Mass Flow Hypothesis