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Anatomy of Flowering Plants

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  1. Function of companion cells is
    1. providing energy to sieve elements for active transport
    2. providing water to phloem
    3. loading of sucrose into sieve elements by passive transport
    4. loading of sucrose into sieve elements
Correct Option: D

Function of companion cell is to load sugar and amino acids into sieve elements. These cells use transmembrane proteins for uptake by active transport.


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