Give functions of companion cells.
Give functions of companion cells.
$\Rightarrow$ The companion cells are specialised parenchymatous cells which are closely associated with sieve tube elements. The sieve tube elements and companion cells are connected by pit fields present between their common longitudinal walls.
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- [AIPMT 1997]
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The xylem fibres are classified into
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Bordered pits are very common in
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