What kind of response is shown by the plant in this diagram?

Negative phototropism

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Positive phototropism

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Positive thigmotropism

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Positive geotropism

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Solution

The correct option is B
Positive phototropism

Growth or movement towards a light source is positive phototropism while growth away from a light source is negative phototropism. In this picture, the plant is showing positive phototropism because growth is towards the light.

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Similar questions

The root of a plant is :

(i) positively phototropic but negatively geotropic

(ii) positively geotropic but negatively phototropic

(iii) negatively phototropic but positively hydrotropic

(iv) negatively hydrotropic but positively phototropic

Stems are :

(a) positively geotropic and negatively phototropic

(b) positively geotropic and positively phototropic

(d) negatively phototropicand positively geotropic

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

(a) geotropism

(b) phototropism

(d) photonasty

Identify the incorrect statements from the following

1. Young stem of vine plant show positive phototropism and positive thigmotropism

2. Sunflower position itself facing the sun is showing positive response to heat generated due to exposure to sunlight

3. Roots show negative thigmotropism and positive hydrotropism

4. Roots show positive chemotropism to some chemical and negative chemotropism to some other chemicals

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