Tuesday, 29 March 2011

2.79

• stimuli - changes in the environment, temeperature changes, light changes
• Receptors detect these stimuli, which makes it respond
• Responses are usually growth (tropism) e.g. the response to light being stimulated would be called phototropism
• A response to gravity is called a geotropism
• Connection between receptor and response is usually plant hormones (plant growth regulators) e.g. auxin

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