Question 17
Photosynthesis and Plant NutritionIn demonstrating the importance of mineral elements in plants, the culture bottle must be darkened to
- A.prevent algal growth in culture solution
- B.allow root growth
- C.prevent breakdown of mineral elements
- D.prevent photosynthesis in the root.
Show the answer and explanation
Answer: A (prevent algal growth in culture solution)
Explanation
If light reached the culture solution, algae would grow in it and use up the minerals. Covering the bottle keeps the solution free of algae.