EMERGING TECHNOLOGIES IN FOOD SCIENCE
BIOTECHNOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Because they dry up.
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They stop making chlorophyll.
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They become coated with colorful algae.
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The air temperature causes the color change
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Detailed explanation-1: -The summer sunlight triggers the leaves to keep making more chlorophyll. But trees are very sensitive to changes in their environment. As summer fades into fall, the days start getting shorter and there is less sunlight. This is a signal for the leaf to prepare for winter and to stop making chlorophyll.
Detailed explanation-2: -Leaves are green in colour because of the presence of green colour pigments within the plant cell called chlorophyll.
Detailed explanation-3: -This process stops green chlorophyll from being replenished and causes the leaf’s green color to fade. The fading green allows a leaf’s true colors to emerge, producing the dazzling array of orange, yellow, red and purple pigments we refer to as fall foliage.