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Question

Nucleated part of phloem is


A
Phloem fibre
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B
Companion cell
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C
Sieve element
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D
All the above
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Solution

The correct option is B Companion cell
Companion  cells are specialized thin walled parenchymatous cells found in phloem. They contain dense cytoplasm and prominent nuclei. Nuclei of companion cells control the metabolic activities of sieve tube elements as they are devoid of nucleus. 
So, the correct answer is 'Companion cell.'

Biology

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