A) sieve elements
B) vessel elements
C) trichomes
D) guard cells
Correct Answer: A
Solution :
Companion cells are characteristic elements of phloem tissue associated with the sieve tubes (sieve elements) in the angiosperms. The siever tubes and companion cells are related ontogenically as they develop from the same mother cell. The companion cells and sieve tubes maintain close cytoplasmic connections through plasmodesmata.You need to login to perform this action.
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