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Question

Assertion :Long distance flow of photoassimilates in plants occurs through sieve tubes Reason: Mature sieve tubes have parietal cytoplasm and perforated sieve plates

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Assertion:
Long distance flow of photoassimilates in plants occurs through sieve tubes.
Reason:
Mature sieve tubes have parietal cytoplasm and perforated sieve plates.
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Sieve tubes are the conducting elements of phloem which are elongated tubular channels formed by end union of numerous cells. The septa between individual sieve tube cells or sieve elements are bulged out. They are called sieve plates possessing a number of perforation and helps in conduction of food

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