Question

(Answer 10, 11, 12, 13, 14, and 15 on the basis of the following given data)
A Hydrilla plant is kept in a beaker containing water. It is converted with an inverted glass funnel and a test tube. The whole experiment is put in sunlight. It is found that the level of water is coming down and a gas accumulates at the upper end of the test tube. The whole experiment is conducted in red, blue and green light. After some time some amount of sodium bicarbonate is added to the beaker. Will these modifications affect the experiments in any way?
What will happen to the rate of photosynthesis in the Hydrilla plant when it is replaced by grass?

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

Answer 1

The correct option is C

Photosynthesis will stop

The correct option is C:
The explanation for the correct option:

1. Hydrilla is a plant growing in the aquatic habitat, found submerged in the water.
2. They use dissolved carbon dioxide in the water for photosynthesis.
3. They have adapted to survive in the presence of the minimal amount of sunlight that is necessary for photosynthesis.
4. Although, grass generally grows in the grassland it has adapted to survive in such environmental conditions.
5. Grasses do not have the features required to survive underwater.
6. Thus, if grasses are used to replace an aquatic plant, then photosynthesis will stop completely.

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