Structural-Organisation-In-Animals Question 540
Damaged sieve tubes are sealed by deposition of callose [DMT 2004]
Options:
A) Pectin
B) Callus
C) Suberin
D) Lignin is a complex organic polymer that is a major component of the cell walls in plants, providing structural support and rigidity. It is also a key component of wood and bark, and plays a crucial role in the transport of water and minerals in vascular plants. Lignin is resistant to biological and chemical degradation, which makes it an important component in the formation of soil and the carbon cycle.
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Answer:
Correct Answer: B
Solution:
Sieve pores are surrounded by a highly refrangible substance called callus which is formed by a carbohydrate called callose.
BETA
