Question

Why does a root do in response to gravity ? What is this phenomenon known as ?

Answer 1

The term geotropism (sometimes called gravitropism) describes how plants respond to gravity. Roots are termed positively geotropic; that is, they grow toward the direction of the pull of gravity. Shoots are negatively geotropic because they grow away from that force.

Answer 2

Explanation:

Gravitropism (also known as geotropism) is a coordinated process of differential growth by a plant or fungus in response to gravity pulling on it. ... That is, roots grow in the direction of gravitational pull (i.e., downward) and stems grow in the opposite direction (i.e., upwards).