prevent overheating of the roots
enable the roots to grow straight down
prevent ionization of water molecules
prevent the growth of algae
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my school please correct this
C is totally wrong
the correct answer is D
in water culture experiment the outside of the gas jars are to be covered completely with black papers to prevent light from entering the gas jars. This prevents algae from growing around the roots and hinder their normal functioning.
The correct answer is:
D. prevent the growth of algae
Excluding light from a water culture experiment helps prevent the growth of algae. Algae require light for photosynthesis, so by keeping the experiment in darkness, algae growth is inhibited. Algae growth can interfere with the experiment by competing with the plant for nutrients and resources.
Explanation:
Light is excluded in a water culture experiment (hydroponics) to prevent algae growth. When light reaches the nutrient solution, it encourages algae to grow. Algae can:
Compete with the plant for nutrients.
Reduce oxygen levels in the solution.
Contaminate the setup, disrupting the experiment.
Why not the other options?
A. Prevent overheating of the roots: While excessive heat can damage roots, the primary reason light is excluded is to avoid algae growth, not heat management.
B. Enable the roots to grow straight down: Root growth direction is influenced by gravity (geotropism), not light exclusion.
C. Prevent ionization of water molecules: Light does not ionize water molecules in this context. Ionization isn't a concern in water culture experiments.
Thus, D is the best answer.
The right answer is D pls
can we pls recheck answers before finalizing it to avoid accumulating errors?
Light is excluded from a water culture experiment in order to prevent algal growth ~ option D
Thank you all for your contributions. Kindly note that the necessary correction has been effected.
