IGCSE Chemistry

Sunday, September 8, 2019

2.83 understand that plants respond to stimuli

Plants increase their chances of survival by responding to environmental stimuli.

There are different tropisms in which plants respond to.

Tropism: growth response of a plant in which direction of stimulus stimulates direction of plant growth.

Examples of plant tropisms include:
1. Phototropism: plant response to the stimulus of light.
2. Geotropism: plant response to the stimulus of gravitational strength.
3. Thigmotropism: plant response to the stimulus of touch. (only certain plants respond to touch, such as Venus flytraps)


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