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9 Cards in this Set
- Front
- Back
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What is auxin ? |
A plant hormone found in the shoots and the roots that controls growth |
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What is phototropism ? |
Where plants grow towards the light, because auxin moves to the shaded side. |
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Explain phototropism |
Auxin gathers on the shaded side of the shoots, so the shaded side has cells that grow quicker. The shoots the grow towards the light and do not bend towards the light |
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Explain geotropism In shoots |
Auxin accumulates on the shaded side, stimulating growth in shoot cells on the shaded side |
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Explain geoptropism in roots |
Auxin accumulates at the Bottom of the roots so cells at the top grow faster ( auxin stunts growth in roots ) and the plant bends into the soil to gain nutrition |
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what are tropisms ? |
responses by plants to ensure they get adequate amounts of light and water. |
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what is a positive phototropism ? |
responses to light in the stem, which means the stem grows towards the light. |
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what is a negative phototropism ? |
responses to light in the roots which means the rots grow away from the light. |
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how do auxins control the growth of plants ? |
they promote cell division and cause cell elongation |
