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(a) What does a root do in response to g...

(a) What does a root do in response to gravity? What is the phenomenon known as?
(b) What does a stem (or shoot) do in response to gravity? What is this phenomenon known as?

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The correct Answer is:
(a) Root bends downwards in the direction of gravity; Positive geotropism (b) Stem (or Shoot) bends towards the light; Positive phototropism
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LAKHMIR SINGH & MANJIT KAUR-CONTROL AND COORDINATION -Exercise
  1. Plant parts show two types of movements, one dependent on growth and t...

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  2. What is a plant hormone? Name four plant hormones. State one function ...

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  3. (a) What does a root do in response to gravity? What is the phenomenon...

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  4. (a) What does a stem (or shoot) do in response to gravity? What is thi...

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  5. (a) What does a Mimosa pudica plant do in response to touch? What is t...

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  6. (a) What does a plant root do in response to water? What is this pheno...

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  7. What is a tendril? Name the two types of tendrils. What does a tendri...

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  8. Name the five types of tropisms. How are tropic movements helpful to p...

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  9. Define chemotropism. Give one example of chemotropism. State whether t...

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  10. Distinguish between tropic movements and nastic movements in plants. G...

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  11. (a) What is meant by nastic movement in plants? Give one example of na...

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  12. A potted plant is kept horizontally for a considerable time. The three...

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  13. Name of the plant hormones which are responsible for the following eff...

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  14. Name the plant organs which are:

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  15. Why is the folding up of the leaves of a sensitive plant on touching w...

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  16. Why is the closing of a Dandelion flower at dusk (when it gets dark) n...

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  17. (a) What is meant by 'tropisms' (or tropic movements)? Explain with an...

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  18. (a) Define phototropism. Give one example of phototropism. (b) How d...

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  19. (a) Define geotropism. Give one example of geotropism. (b) What is m...

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  20. (a) How does control and coordination take place in plants? How does i...

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