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Questions and Answers
What are the two main types of tropisms?
What are the two main types of tropisms?
- Positive and negative (correct)
- Phototropic and auxinotropic
- Stimulus and response
- Unequal and equal
What does auxin control in plants?
What does auxin control in plants?
- Cell division
- Cell elongation (correct)
- Phototropism
- Tropisms
How do stems and roots respond to auxin differently?
How do stems and roots respond to auxin differently?
- Stems grow more and roots grow less (correct)
- Stems grow less and roots grow more
- Stems grow the same and roots grow the same
- Stems and roots do not respond to auxin
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Study Notes
- Plants have developed responses called tropisms to help them grow in the direction of light and water.
- There are two main types of tropisms: positive tropisms, which mean the plant grows towards the stimulus, and negative tropisms, which mean the plant grows away from the stimulus.
- Phototropism is a response to the stimulus of light.
- Stems and roots respond differently to high concentrations of auxins: cells in stems grow more, while cells in roots grow less.
- Auxins control the growth of plants by promoting cell division and causing elongation in plant cells.
- Phototropism is caused by an unequal distribution of auxin, and is different in stems and roots. Stems respond more to high concentrations of auxins, while roots respond less.
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