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6.Anatomy of Flowering Plants
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The phloem of angiosperms differs from that of other vascular plants by the presence of
A
Vessels
B
Companion cells
C
Tylosoides
D
Albuminous cells
Solution
Companion cells are thin-walled elongated cells connected with sieve tube cells through plasmodesmata, in phloem cells. They are the characteristic of angiosperms, function in controlling metabolic activities of sieve tube cells by nucleus of companion cells. Pteridophytes and gymnosperms (other vascular plants) lack companion cell.
Standard 11
Biology
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