Question

Name the process and label it.

Answer 1

The image given above described the process which was carried out to prove that plants cannot do photosynthesis in the absence of carbon dioxide. The parts labeled as 1 and 2 show the condition of the leaves after the completion of the experiment.

Complete answer:
• The above image shows the experiment which is known as the half leaf experiment.
• It is already known that chlorophyll (green pigment of the leaf), light, and carbon dioxide are required for photosynthesis to occur.
• There are different types of experiments to check for starch formation on two leaves. One of these experiments was known as the Half leaf experiment.
• In this experiment, one of the leaves is enclosed in a test that contains some cotton soaked with potassium hydroxide which absorbs the carbon dioxide. While the other leaf is exposed to the air. This setup is placed in light for some time. Later testing for starch in the two leaves, it is found that the exposed leaf contains the starch whereas the leaf that was kept in a jar down not contains the starch. This shows that carbon dioxide as required for photosynthesis

The part labeled in the diagram are:
- This is the leaf where photosynthesis does not occur.
- This is the leaf where photosynthesis occurs.

Note: The experiment was carried out to show that carbon dioxide, chlorophyll, and light are necessary to conduct the process of chlorophyll. If any of the elements is missing then the plant won’t be able to synthesize starch. This experiment helps in the understanding of the photosynthesis.