Control and Coordination | Movement In Plants | CBSE Class 10 Science |Biology | Chapter 7

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Control and Coordination | Movement In Plants | CBSE Class 10 Science |Biology | Chapter 7

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You must have to check out other parts of this video at,
PART 1 – Control and Coordination In Plants:
Tropism and Phototropism:
Control and Coordination in Humans:

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Hello students, here in this video we are going to study a very important topic as Movement in plants form chapter 7 Control and Coordination of CBSE class 10 science.

Control and Coordination
Systematic working of the various organs of an organism (plants or animals) producing a proper response to the stimulus is called co-ordination.

Control and Coordination in Plants
Plants also show movement by the growth of their various parts. It is the plant hormones that promote its growth. The movement of plant parts is due to various stimuli like gravity, water, light, chemical, touch, etc.

In plants, control and coordination are conveyed with the help of plant hormones.
Plants do coordinate, but in a different way than animals. Some plants are short, some are tall, some dense and some scanty.
All these parameters are influenced by the presence of hormones called plant hormones.
These hormones are also called phytohormones or plant growth regulators. Phytohormones are responsible for control and coordination in plants. This movement is always in a controlled and organized environment.

Plants do not have a nervous system or muscles to respond to the stimulus.
Plants show two different types of movement in responding to the stimulus.
i) one dependent on growth.
ii) another independent of growth.

Movements in plants:

Trophic movement – growth movement towards or away from the stimulus
Nastic movement – non-growth movement, independent of stimulus

Some of the Important Points:
• Control and coordination in plants are done by phytohormones.
• They are naturally occurring chemical substances which control one or other aspect of growth.
• Auxin – Cell enlargement and differentiation.
• Gibberellins – In the presence of auxin, it promotes cell enlargement and differentiation.
• Cytokinins – Promotes cell division, the opening of stomata, etc.
• Abscisic acid – Closing of stomata, wilting and falling of leaves, etc.

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