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26/11/2020 3:13 pm
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Write one example each of the following tropic movements :
(i) Positive phototropism
(ii) Negative phototropism
(iii) Positive geotropism
(iv) Negative geotropism
(v) Hydrotropism
(vi) Chemotropism
1 Answer
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26/11/2020 3:15 pm
(i) Positive phototropism: shoots growing towards light.
(ii) Negative phototropism: roots growing away from light towards ground.
(iii) Positive geotropism: growth of roots towards earth due to the pull of the earth.
(iv) Negative geotropism: shoots growing away from the earth.
(v) Hydrotropism: roots growing towards the source of water.
(vi) Chemotropism: growth of pollen tubes towards the ovules.