Question

If we take a potted plant with broad leaves take two strips of black paper and cut off the smallest square in their centres cover a part of police without them with paper clips with the plant in the sunlight for 2 to 5 days observed the difference in the colour of the covered and uncovered questions of the only for my dentist on this leave did the two parts show any difference and reserves now take second please remove the strip and expose the covered part to the sunlight for 2-3 days and do the iodine test again.Describe your answer

Answer 1

The surface area of the leaf that is not getting any light for the duration of the experiment will want to conserve its resources. One of the valuable resources a plant has is its chlorophyll pigment. This is what gives the plant leaves a green color. I predict that the surface area that is covered will lose its chlorophyll and hence lose its green pigment. Since its more difficult for the plant to recycle the other pigments (the carotenoids), a yellow pigment will remain, much like what we see in fall leaves. In the square area that is exposed to the sun light I predict no change. The result will be a yellow leaf with a green square on it. 

Answer 2

Answer:

Explanation:

Concept:

The area of the leaf covered in black paper remains colorless after the addition of the iodine solution, whereas the area that was exposed to sunlight acquires a blue-black.

Solution:

The leaf's surface area that will be in the dark for the duration of the experiment will try to conserve its energy. The pigment chlorophyll is one of a plant's most important resources. The reason the plant's leaves are green is because of this. I believe that the covered surface area will eventually lose its chlorophyll and hence its green color. The other pigments (the carotenoids) are more difficult for the plant to recycle, thus a yellow pigment will persist, similar to what we observe in fall leaves.

It has been discovered that the black paper-covered leaf will turn brown, and the exposed portion of the leaf will turn blue-black. This finding demonstrates that starch only forms in the leaf when sunlight is present and does not form when sunlight is not there.

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