Question

5. What is phototropism ? answer me soon

Answer 1

The stimulation or movement of plants due to sunlight is phototropism. It is due to Harmon named Auxins. Roots move against the sunlight which is called negative tropism while branches or upper part of plant move towards the sunlight which is called position tropism.

Answer 2

Phototropism is the movement of plants in relation to light. It is considered just one way plants move. This is probably the most notable in seedlings. Light triggers the plant's hormone known as auxins to move to the shaded part of the plant that is not exposed to the light.

In response to the hormone, the plant's cells start to elongate but the cells on the lighted side remain their normal size. This makes the plant bend towards the light. If the plant bends and stretches towards the light too much, it will grow tall and lanky, which is considered leggy marijuana, or leggy seedlings. It's a signal the plants are starving for more light.