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NEET2004BotanyTransport in PlantsActual

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

Options

  1. Aincrease in number
  2. Bdisappear
  3. Cincrease in size
  4. Ddecrease in size.

Correct answer

B. disappear

Step-by-step 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.

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