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6.Anatomy of Flowering Plants
normal
Companion cells are closely associated with
A
sieve elements
B
vessel elements
C
trichomes
D
guard cells.
(AIPMT-2012)
Solution
(a) : Companion cell is a type of cell found within the phloem of flowering plants. Each companion cell is usually closely associated with a sieve element. They remain connected with sieve cells by plasmodesmata. They help in loading of phloem sieve cells with sugars through active transport.
Standard 11
Biology
