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12 Cards in this Set
- Front
- Back
Define Stimulus |
Anything in the surroundings that an organism can respond to |
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Define Response |
The action taken to a stimulus |
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Define Phototropism |
Growth response of a plant to light |
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Define Geotropism |
Growth response of a plant to gravity |
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Define Hydrotropism |
Growth response of a plant to water |
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Define Chemotropism |
Growth response of a plant to chemicals |
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Define Thigmotropism |
Growth response of a plant to touch |
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Define Tropism |
Growth response of a plant to a stimulus |
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Function of Plant Growth Regulators |
Controls growth in plants |
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Two types of PGR |
Growth promotors and Growth inhibitors |
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Functions of Ethene |
Causes ripening of a fruit Causes fruit colour to develop Causes leaves to fall in Autum |
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Functions of Abscisic acid |
Causes buds/scabs to form on trees Causes dormancy in seeds Causes stomata to close in dry conditions |