Q2 of 70 Page 72

Why do we perform the iodine-test?

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We perform iodine test to show the presence of starch. The presence of starch will be indicated by blue-black colour when iodine solution is poured on the surface of the leaf.

If starch will be absent it will be indicated by brown colour.


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3

If we keep on increasing CO2 concentration in the air, will the rate of photosynthesis also keep on increasing in direct proportion?

Yes/No ……………………………….


Explain: ……………………………….

 1

Why is it necessary to research a plant before performing an experiment on photosynthesis?

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 3

What chemical do you use to remove CO2 from inside a flask in certain experiments on photosynthesis?

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 4

All food chains start with a plant. Why is this so?

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