Question

Hydrilla leaf is used in an experiment to test that _______________.

• A. Chlorophyll is necessary for photosynthesis
• B. Light is necessary for photosynthesis
• C. CO${}_2$ is necessary for photosynthesis
• D. Oxygen is evolved during photosynthesis

Answer 1

The correct option is D Oxygen is evolved during photosynthesis

To test that oxygen is evolved during photosynthesis few fresh Hydrilla plants in a glass beaker filled with water. They are kept in sunlight. After some time some bubbles (oxygen) escapes from the plant. This proves that oxygen is produced during photosynthesis. It is evolved during the light reaction of photosynthesis.

So, the correct answer is option D.