Thursday, 24 March 2011

Video: 2.79 Plants and stimuli



- Stimuli are changes in the environment, Temperature or light.
- Plants have receptors that detect stimuli and turn into response
- Response - Take form of growth - Tropism, involving light (phototropism)
- Tropism, involving Gravity (Geotropism)
The light comes in all directions meaning that the light will grow forward.
If light comes into the plant sideways that means that the plant will grow in the direction the light is coming in.
The light on one side causes the plant to move to the opposite side.
Auxin causes more growth to the plant which makes the plant grow in the other direction an also causes the plant to bend.
Cell division is called mitosis which means that the cells multiply

1 comment:

  1. good to see you making the point about what auxin actually does. Well done

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