The leaves of Vallisneria are thin and long to help the leaves float in water.

Q. Why are the leaves of Vallisneria thin and long?

Q. Tape grass is a plant that remains submerged in water. Its leaves are narrow and long. How does this help the tape grass?

Q. In a pond, we see plants which are free-floating; rooted–submerged; rooted emergent; rooted with floating leaves. Write the type of plants against each of them.

Plant Name Type

a. Hydrilla

b. Typha

c. Nymphaea

d. Lemna

e. Vallisneria

Q. Write the adaptation in aquatic plants due to which
(a) submerged leaves can bend in the flowing water.
(b) Leaves can float on the surface of water.

Q.

Question 21

Write the adaptation in aquatic plants due to which

(a) submerged leaves can bend in the flowing water.

(b) leaves can float on the surface of water.