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Language of Nervous System

Roots of the ...

Question

Roots of the plants are ___________.

A

Negatively geotropic

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B

Positively geotropic

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C

Negatively thigmotropic

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D

Positively thigmotropic

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Solution

The correct option is B Positively geotropic
Growth movements of plants in response to an external stimulus are called tropic movements. The roots show positive geotropism because they always grow towards the ground towards the gravity.

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Similar questions

Q. (a) What is meant by positive tropism and negative tropism? Explain with examples.
(b) Define thigmotropism. Give one example of thigmotropism.
(c) What is the difference between thigmotropism and thigmonasty? Name one plant which exhibits thigmotropism and one plant which exhibits thigmonasty. What behaviour (or responses) of these plants make you think that they exhibit thigmotropism and thigmonasty respectively?

Q. When the leaves of a Mimosa pudica plant are touched with a finger, they fold up quickly. This is an example of :
(a) chemotropism
(b) thigmonasty
(c) photonasty
(d) thigmotropism

The bending of the shoot of a plant in response to light is called :

(a) geotropism

(b) phototropism

(c) thigmotropism

(d) photonasty

Q. (a) Define geotropism. Give one example of geotropism.
(b) What is meant by 'positive geotropism' and 'negative geotropism? Give one example of each type. Draw a labelled diagram to illustrate your answer indicating the plant part which shows positive geotropism and the plant part which shows negative geotropism.
(c) Name one plant part which exhibits positive thigmotropism.

Is thigmotropism in touch me not plant positive or negative?

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Language of Nervous System

Standard X Biology

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