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Questions

Questions. What is a hormone? What is phototropism? If a tropism is positive, what does this mean? What is geotropism? Is a shoot usually positively or negatively phototropic? Name a plant hormone. What effect does light have on auxin ? How does auxin make a shoot curve?

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Questions

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  1. Questions • What is a hormone? • What is phototropism? • If a tropism is positive, what does this mean? • What is geotropism? • Is a shoot usually positively or negatively phototropic? • Name a plant hormone. • What effect does light have on auxin? • How does auxin make a shoot curve? • If a light is shone on a plant from the side, which side of the plant grows the most? • If a shoot tip is cut off, what happens to the plants growth?

  2. Answers • A chemical messenger • A growth response to light • Towards the stimulus • A growth response to gravity • Positive • Auxin or gibberellin • Moves to shaded side • Causes cell elongation • The dark side • Shoot stops growing and side shoots grow.

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