Question

Give reasons : (a) More transpiration occurs from the lower surface of a dorsiventral leaf. (b) Leaves of certain plants roll up on a bright sunny day. (c) Fresh water fish cannot survive in sea water.

Answer 1

Answer:

More transpiration occurs in lower surface of dorsiventral leaf because the number of stomata present in the ventral side of the leaf is more than the number of stomata present in the dorsal side of leaf.

Answer 2

Answer:

A) because more no of stomata found in lower pressure

Explanation:

B) special kind of cells called bulliform cells are present for this which roll up the leaf in dry conditions (in Monocots). C) because of osmotic gradient they cant survive