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9 Cards in this Set
- Front
- Back
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describe the direction that shoots grown in, relating to the things that they are sesitive to?. |
shoots are sensitive to light, they grow towards the light |
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describe the direction that roots grow on, relating to the things that they are sesitive to. |
roots are sesitive to gravity they grown towards to force of gravity |
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what is the name of the horome in plants? |
auxin |
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what is phototopism? |
plants groth respond to light |
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descibe how auxin controls phototopism. |
cause cell elongation in the shoots |
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what is geotropism? |
plants growth respond to gravity |
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describe how auxin contols geotropism. |
stops cell elongation in the root. |
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what do negative and postive tropism mean? |
positive tropism- towards the stimulus. negative tropism- away from the stiumulus |
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how can plant growth hormones be used in agricture? |
selective weed killers- auxin makes broad leaved plants grow out of control and die. rooting power- auxin cutting develops roots quickly. seedless fruit- flowers sprayed with hormones to make fruit develop but not seeds. fruit ripening- farmers use hormones to control fruit ripening. |
