Which one is living and non-nucleated at maturity?

Sieve tubes

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Companion cells

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Collenchyma

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Parenchyma

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Solution

The correct option is A Sieve tubes
In plant anatomy, sieve tube elements, also called sieve tube members, are highly specialized type of elongated cell in the phloem tissue of flowering plants. Unlike the water-conducting xylem vessel elements that are dead when mature, sieve elements are living cells. They are unique in lacking a nucleus at maturity.
So, the correct answer is 'Sieve tubes.'

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