Question

A Hydrilla plant is kept in a beaker containing water. It is covered with an inverted glass funnel and a test tube full of water is placed over it. Care is taken about the water level so that no bubble enters the test tube. The whole experiment is put in sunlight. It is found that the level of water is coming down and gas accumulates at the upper end of the test tube. The whole experiment is conducted in red, blue and green light alternatively. After some time some amount of Sodium bicarbonate is added to the beaker.

What will happen to the rate of photosynthesis if the plant Hydrilla is replaced by the grass?

• A. Rate will increase
• B. Rate will decrease
• C. Photosynthesis will stop
• D. None of the given statement is correct

Answer 1

The correct option is C

Photosynthesis will stop

The correct option is (C):

Explanation for the correct option:

1. Hydrilla is a green aquatic plant that uses carbon dioxide, water, and sunlight to generate organic compounds and oxygen through photosynthesis.
2. If the plant Hydrilla will be replaced by the normal grass the photosynthesis will stop.
3. Normal grass can't survive in water and therefore will not perform photosynthesis.

Final answer: Photosynthesis will stop if Hydrilla is replaced by the grass.