All the following are true of companion cells EXCEPT that they
A) are connected to sieve-tube elements via plasmodesmata.
B) cooperate with sieve-tube elements in conducting sugar-rich solutions.
C) supply materials to repair the plasma membrane of sieve-tube elements.
D) fuse together to form the sieve plates of sieve-tube elements.
E) provide proteins and ATP to sieve-tube elements.
Correct Answer:
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