Question

What is phototropism and geotropism describe an activity to show that light and gravity change the direction that plant

Answer 1

The growth of a plant in response to light is known as phototropism.

If a plant is kept near the only open window of a dark room, after few days it can be found that the growth of the plant tip is towards the window and the plant is growing by bending itself towards the light source. This proves that light is responsible for the bending of the branch.

The growth of plant part in response to water is known as hydrotropism.

Take pot filled with soil and a plant. Place a clay pot filled with water inside it. Do not water the plant for few days. After few days it is observed that the roots of the plant are growing towards the clay pot for the source of water.

Answer 2

The growth of plant in the direction of sunlight is known as phototropism

Eg:- place a sunflower plant in sunlight. We observe that the flower moves in the direction of sunlight is known as phototropism

The movement of plant in the direction of gravity is known as geo tropism.

Eg:- A plant when grown it is in the direction of gravityshowing positive geotropism