Question

Define and give
Example?
1 phototropism
2 geotropism
3 hydrotropism
4 chemotropism

Answer 1

Phototropism
The response of plant towards the sunlight is
called "Phototropism"
Eg:- Creepers
Geotropism
The response of plant towards gravitational force positively is called "Geotropism"
Eg:- Plant roots grow downwards
Hydrotropism
The response of plants in search of water is called "Hydrotropism"
Eg:- Plant which grows near a rock
Chemotropism
The response of plants to chemicals is called "Chemotropism"
Eg:- Pollen grains respond to this stimulus as pollen tubes grow to reach the ovule for fertilisation