Name the stimulus which causes the following movements in plants :

phototropism, thigmotropism, hydrotropism and geotropism.

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Solution

phototropism -light
thigmotropism-touch
hydrotropism-water or moisture
geotropism-gravity

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What is the stimulus in :

(a) phototropism

(b) geotropism

(d) hydrotropism

(e) thigmotropism

Question 10
The movement of the shoot towards light is

(a) geotropism
(b) hydrotropism
(c) chemotropism
(d) phototropism

The movement of a shoot towards light is:

(a) geotropism

(b) hydrotropism

(d) phototropism

The movement of a plant part in response to the force of attraction exerted by the earth is called:

(a) hydrotropism

(b) geotropism

(d) phototropism

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