What is the function of companion cell?

Providing energy to sieve elements for active transport

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Loading of sucrose into sieve elements by passive transport

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Maintaining pressure gradient in sieve tube

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Loading of sucrose into sieve elements

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Solution

The correct option is C Maintaining pressure gradient in sieve tube
Companion cells are found along with sieve tube elements in the phloem. The main function of companion cells is to maintain pressure gradient in the sieve tube elements.

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