Thursday 24 March 2011

2.79 Plants and Stimuli



2.79 Understand the plants respond to stimuli

Stimuli are the changes in the environment for example temperature and light.

The receptor detects stimuli and then turns it into response

Response takes form of growth. There are two types of response to stimuli (tropism).

A tropism involving a response to:
1. Light is known as phototropism
2. Gravity is known as geotropism

The connection between the receptor and the response usually takes the form of plant hormones which also can be identified as plant growth regulators for example auxim.

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