Question

Write the control and coordination in plants and animals.

Answer 1









Coordination in Plant



Nervous System



Nerve Impulse and Reflex Action

 

What is coordination in plants?

Coordination is the ability to use different parts of the plant together, smoothly and efficiently. In plants, coordination is due to the result of a chemical system, wherein plant hormones or phytohormones have a major role.

Movement in plants

Plants exhibit two types of movements.

Growth-dependent movements called the Tropic Movements. ( towards or away from a stimulus)

Non-growth dependent movements called the Nastic Movements. ( independent of stimulus)

Tropic movements

These can be classified again into 5 types. They are:

Phototropism (light)

Geotropism (gravity)

Hydrotropism (water )

Chemotropism (chemicals)

Thigmotropism (touch)

Phototropism – It is the movement of plants in response to light. The shoot system of a plant exhibits this characteristic. The shoot moves towards the light.

Geotropism – It is the movement of a plant part towards the soil. This is a characteristic of the root system. The roots always move in the direction of the earth’s gravity.

Hydrotropism– It is the movement of a plant towards the water. The stimulus here is water.

Chemotropism – It is the movement of plants in response to a chemical stimulus. A classic example of this type of movement is the growth of the pollen tube towards the ovule, during fertilization, in a flower.

Thigmotropism – It is a directional movement in plants in response to touch. For e.g. the plant tendrils climb around any support which they touch.

Answer 2

The control and coordination in plants and animals are tabulated below.