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Question
Assertion :Cambium has periodic activity maximum in spring season making vessels wide and more in number called as spring or early wood. Reason: The rate of photosynthesis and food assimilation is maximum in spring.
Assertion :Cambium has periodic activity maximum in spring season making vessels wide and more in number called as spring or early wood. Reason: The rate of photosynthesis and food assimilation is maximum in spring.
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Solution
The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
In spring season the cambium makes the wider and broader vessels as more water is needed to meet the requirement by increased transpiring surface. Hence, the light colored broad zone of wood is called as spring wood or early wood. Transpiration and water requirement are more because during spring the rate of photosynthesis and food assimilation is maximum.
Therefore, the correct answer is option A.
In spring season the cambium makes the wider and broader vessels as more water is needed to meet the requirement by increased transpiring surface. Hence, the light colored broad zone of wood is called as spring wood or early wood. Transpiration and water requirement are more because during spring the rate of photosynthesis and food assimilation is maximum.
Therefore, the correct answer is option A.
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