3 Questions
What are the two main types of tropisms?
Positive and negative
What does auxin control in plants?
Cell elongation
How do stems and roots respond to auxin differently?
Stems grow more and roots grow less
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.
Test your knowledge of plant tropisms and the role of auxins in controlling plant growth with this quiz. Explore the different types of tropisms and how plants respond to stimuli such as light and water.
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