Stems are :

(a) positively geotropic and negatively phototropic

(b) positively geotropic and positively phototropic

(c) negatively geotropic and positively phototropic

(d) negatively phototropicand positively geotropic

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Solution

(c) negatively geotropic and positively phototropic

Stems grow away from the roots and exhibits tropic movement in the direction where there is sunlight.

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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

Name the plant organs which are :
(a) positively phototropic
(b) positively geotropic
(c) negatively geotropic
(d) positively hydrotropic

Q. 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
(a) (i) and (ii) (b) (ii) and (iii) (c) (iii) and (iv) (d) (i) and (iv)

Q. Give one example each of a plant part :
(a) which is positively hydrotropic as well as positively geotropic.
(b) which is positively phototropic but negatively geotropic.

Give one example of plant part. [2 MARKS]
A. Which is positively hydrotropic as well as geotropic.
B. Which is positively phototropic but negatively geotropic.

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Geotropism

Standard X Biology

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Stems are : (a) positively geotropic and negatively phototropic (b) positively geotropic and positively phototropic (c) negatively geotropic and positively phototropic (d) negatively phototropicand positively geotropic

(c) negatively geotropic and positively phototropic Stems grow away from the roots and exhibits tropic movement in the direction where there is sunlight.

Stems are :

(a) positively geotropic and negatively phototropic

(b) positively geotropic and positively phototropic

(c) negatively geotropic and positively phototropic

(d) negatively phototropicand positively geotropic

(c) negatively geotropic and positively phototropic

Stems grow away from the roots and exhibits tropic movement in the direction where there is sunlight.