JAMB - Biology (1987 - No. 17)
In demonstrating the importance of mineral elements in plants, the culture bottle must be darkened to
prevent alga growth in culture solution
allow root growth
prevent breakdown of mineral elements
prevent photosynthesis in the root
Explanation
While demonstrating the importance of mineral elements in plants, darkening the culture bottle helps to prevent algae growth. This is because algae growth can compete with plants for nutrients, potentially skewing the experiments's results. By blocking light, algae growth will be minimized.
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