The topic of 2023 Alipay Ant Manor on October 18 has been updated. Today’s topic is: Many trees will lose their leaves in autumn. Which characteristic of the leaves is related to this? What is the correct answer? Many friends may not know yet. The following is the correct answer for everyone to share, I hope it can help you.
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Many trees lose their leaves in autumn. Which characteristic of the leaves is related to this?
Answer: Not resistant to cold
Analysis: In order to continue to survive, trees form an abscission layer when the leaf stalks and branches are connected. The petioles originally grew stiffly on the branches. In autumn, as the temperature drops, several layers of fragile parenchyma cells form at the base of the petiole. Because these cells separate easily from each other, they are called abscission layers. After the abscission layer is formed, it will break if there is a slight breeze, and the leaves will fall down.
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