Question

All the given plants have underground stems
performing function of perennation, except
(1) Colocasia; Potato
(2) Turmeric; Onion
(3) Cucumber; Watermelon
(4) Ginger; Alocasia​

Answer 1

Answer:

3)Cucumber and Watermelon.

These plants show aerial stem.

Answer 2

Answer:

The answer is (3)

Explanation:

Instead of underground modification, watermelon and cucumber have modified axillary buds. The axillary bud alteration produces characteristic features-

• tiny
• wiry
• leafless
• spirally coiled branches

That aid the weak plant in climbing the stem tendrils.

Where as underground stem performs perennation, a term used to describe plants that can retain food and nutrients to endure adverse conditions and bypass the germination process. When the plant is given favourable conditions, the organism germinates with the help of a perennating organ. Because the new plant grows from a piece of the original plant, perennation is a sort of vegetative reproduction.