Structural Organisation In Animals Question 252
Question: The chief function of sieve tubes is [DPMT 1990]
Options:
A) To translocate the organic materials manufactured in the leaves
B) To conduct minerals
C) To transport water from root to leaves
D) To help the plant in forming wood
Show Answer
Answer:
Correct Answer: A
Solution:
The sieve tubes are syncytes and allow free diffusion of soluble organic substances.
The callose also plays important role.
Usually the perforations in the sieve plates are surrounded by callose.
The callose is soluble and disappears when the solute is dilute so that the solute can pass from one cell to another cell through the pores.
BETA
