Since water expands when frozen, the tender leaf cells would rupture during the winter, making them useless for photosynthesis. Without dropping these leaves, such a tree would be stuck with thousands of unproductive appendages and no way to make food!
Dropping them gives the plant a fresh start in the spring, and the nutrients from the decaying leaves are recycled to help grow the next leafy generation. Interestingly, autumn leaves are not simply blown off trees but are separated from the plants in a highly controlled process.
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Since water expands when frozen, the tender leaf cells would rupture during the winter, making them useless for photosynthesis. Without dropping these leaves, such a tree would be stuck with thousands of unproductive appendages and no way to make food!
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Answer:
Dropping them gives the plant a fresh start in the spring, and the nutrients from the decaying leaves are recycled to help grow the next leafy generation. Interestingly, autumn leaves are not simply blown off trees but are separated from the plants in a highly controlled process.
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