What Is the Function of Companion Cells

question 33

Multiple Choice

What is the function of companion cells?  

• A) These cells provide metabolic support to vessel elements.
• B) These cells provide metabolic support to sieve elements.
• C) These cells provide metabolic support to tracheids.
• D) These cells prevent water from entering the endodermis.
• E) These cells control the opening and closing of stomata.

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