Question

Which of the following is long term adaptation ?
a) Synthesis of melanin in skin during exposure
of sunlight
(b) Increase in number of RBCs in people live in
high altitude areas
(c) Piercing and sucking type mount parts of
female mosquitoes
d) Growth of plants roots towards gravity
​

Answer 1

Hi Friend

Growth of plant towards root is long term adaptation.

Hope it helps

Answer 2

The growth of plants roots towards gravity is the long term adaptation.

Explanation:

Roots of the plant respond towards the gravitational force of the Earth. The parts of the plants can respond to the lights also. Roots grow towards the gravitational force and against the light.

This type of growth towards the gravitational force is called gravitropism and the growth in the response towards the light is called phototropism. The hormones of the plant body are responsible to control the tropism.