(A) Companion cells are specialized parenchyma cells associated with sieve tube elements in the phloem of angiosperms. They are involved in the loadin

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Phloem elements where substances are transported towards other plant parts.

(A) Companion cells are specialized parenchyma cells associated with sieve tube elements in the phloem of angiosperms. They are involved in the loading and unloading of sugars into the sieve tubes for translocation to various parts of the plant. Therefore,they are found in phloem tissue.

Class 11 Biology Anatomy of Flowering Plants Permanent Tissue

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Companion cells are thin-walled cells found in:

A
Phloem elements where substances are transported towards other plant parts.
B
The endodermis of the root for rapid water transport from the cortex to the pericycle.
C
The seed coat to facilitate the emergence of the developing embryonic axis during germination.
D
The central part of the style through which the pollen tube grows towards the ovule.