WAEC Biology 2008 Question 5

Question 5

Cell and Its Environment

A pupil accidentally "watered" a potted plant with concentrated salt solution. After sometime the plant began to wilt.
Which of the following activities would revive the plant?

  1. A.Covering the plant with dark paper to prevent further water loss from its surfaces
  2. B.Leaving the plant to adapt to the condition
  3. C.Exposing the plant to high concentration of oxygen
  4. D.Adding more water to the soil.
Show the answer and explanation

Answer: D (Adding more water to the soil.)

Explanation

Adding plenty of water dilutes the salt in the soil, so water can again enter the root cells by osmosis and the cells regain turgor.