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10 Cards in this Set
- Front
- Back
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What direction do shoots grow in, relating to what they are sensitive in |
Shoots are sensitive to light so grow towards the light |
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What direction to roots grown in, relating to what they are sensitive to. |
Roots are sensitive to gravity so they grow towards the force if gravity |
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What is the name of the hormone in plants? |
Auxin |
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What is phototropism? |
A plant growth response to light |
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How does auxin control phototropism? |
It cause cells to elongate in the shoots |
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What is geotropism? |
Plant growth response to gravity |
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How does auxin control geotropism? |
Stops cell elongation in the roots |
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What does negative tropism mean? |
Away from the stimulus |
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What does positive tropism mean? |
Towards the stimulus |
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How can plant growth hormones be used in agriculture? |
Selective weed killers - auxin makes broad leaved plants grow out of control and die Rooting powder - auxin makes cutting develop roots quickly Seedless fruit - flowers sprayed with hormones to make fruit develop seedless Fruit ripening - use hormones to control fruit ripening |
