Question 19
The movement of sunflower in accordance with the path of the sun is due to

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

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Solution

(a) phototropism

Phototropism is a tropic movement in which the plants respond to external stimuli (light).If the plant growth is towards the light source, it is called positive phototropism, while if the growth is away from the light source, it is called negative phototropism.

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Similar questions

Question 10
The movement of the shoot towards light is

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

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

Question 18
The growth of pollen tubes towards ovules is due to

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