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6.Anatomy of Flowering Plants
normal
$P -$ protein is found in
A
Collenchyma
B
Parenchyma
C
Xylem
D
Sieve tube
Solution
(d) A sieve tube is analogous to $RBC$, both being living but enucleated at maturity.
A network of fibres of $P_1$ and $P_2$ protein is present in the central part of lumen of sieve tube which controls movement of materials and with callose, the sealing of pores after injury.
Standard 11
Biology