Damaged sieve tubes are sealed by deposition of

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10.Biotechnology and its Application

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Damaged sieve tubes are sealed by deposition of

A

Pectin

B

Callus

C

Suberin

D

Lignin

Solution

(b) Sieve pores are surrounded by a highly referangible substance called callus which is formed by a carbohydrate called callose.

Standard 12

Biology

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