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Question

Which of the following does not lose their nucleus at maturity?

A
Companion cells
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B
Sieve tube cells
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C
Vessels
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D
All of the above
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Solution

The correct option is A Companion cells
Sieve tube cells and the vessels are living at the initial stages but they become dead at maturity so they lose the nucleus. While companion cells are living and they provide proteins and ATP to the sieve tube cells and vessels.
So, the correct answer is option A.

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