Question 23
Photosynthesis and Plant NutritionThe diagram is an illustration of the growth of a plant in a water culture. After a few days, the solution turned green and the plant died.
What precaution should have been taken to prevent the solution from turning green?
- A.Use a non-green plant for the experiment
- B.Aerate the solution daily
- C.Cover the culture vessel with opaque paper
- D.Keep cotton wool around the seedling to make it dry.
Show the answer and explanation
Answer: C (Cover the culture vessel with opaque paper)
Explanation
The green colour is algae growing in the light; covering the vessel with opaque paper keeps light out so algae cannot grow.