Question

due to the above reason the leaf of the plant shown in the above diagram does not answer to the starch test. a. absence of water b. absence of sunlight c. carbon dioxide absence b. d & c

Answer 1

Answer:

If there is absence of water, CO2 and sunlight then, leaf will not answer to starch

Answer 2

Due to the reason the leaf of the plant shown does not answer to the starch test when absence of sunlight.

Option (b)

Explanation:

• The starch test is conducted to explain the importance of the chlorophyll present in the green plant and in its parts which are green in performing the process of the major action in the plant called photosynthesis.

• First, the leaf of the plant will get boiled in water and ethanol and then it will be covered by the black paper with some spaced uncovered.

• Then iodine solution is dropped on the covered leaf.

• The leaf which is uncovered will turn into blue-black colour the rest will remain in pale green.

• This justifies the presence of chlorophyll which requires sunlight to perform photosynthesis.

Learn more about sunlight

Define matter . Is sunlight matter? Justify your answer.

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It is caused by dispersion of sunlight by tiny water droplets. A rainbow is always formed in the opposite direction as of the sun.

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