The response of plant roots towards water is called _________.

chemotropism

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hydrotropism

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gravitropism

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phototropism

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Solution

The correct option is B hydrotropism
The movement or the growth of a plant in relation to the stimulus of water is called hydrotropic movement and the equivalent response to the stimulus of water is called hydrotropism. In this type of movement, roots show positive hydrotropic response, as they move and grow towards the water.

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Similar questions

Q. Fill in the following blanks :
(a) A plant's response to light is called ..........
(b) A plant's response to gravity is called ........
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(d) Plant roots grow downward in response to ........
(e) Tendrils wind around a support in response to .......
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Fill in the following blanks:

(a) A plant's response to light is called .................

(b) A plant's response to gravity is called .................

(d) Plant roots grow downward in response to .............

(e) Tendrils wind around a support in response to ..........

(f) Plant roots grow towards .......... and in the direction of force of ...............

(g) A root of a plant grows downward. This is known as ..............

(h) ........... is the hormone that causes phototropism in plants

(i) The response of leaves to the sunlight is called ..............

Q. The behavioural response of plants where they move towards or away from a stimulus is called .

Match the following:

$\begin{matrix} A & B (1) Growth of sunflower towards a light source & (i) Chemotropism (2) Growth of tree roots towards earth & (ii) Hydrotropism (3) Growth of plant roots towards or away from moisture & (iii) Phototropism (4) Growth of a plant part in response to a chemical stimulus & (iv) Geotropism \end{matrix}$

Q. Which of the following is not caused by a growth movement?
(a) bending of the shoot of a plant in response to light
(b) closing up of leaves of a sensitive plant on touching with an object
(c) climbing up of a plant on an object by using tendrils
(d) movement of the root of a plant towards a source of water

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