The root of a plant is: (i) positivel...

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)

Text Solution

Verified by Experts

The correct Answer is:

B

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describe following parts : (i) positively phototropic and (ii) negatively geotropic.

Negative geotropism is observed in

Knowledge Check

Most roots are positively geotropic The negatiely

A

prop roots

B

floating roots

C

climbing roots

D

respiratory roots

Negative phototropism occurs in

A

Root

B

Stem

C

Leaf

D

Flower

Negative phototropism occurs in

A

Root

B

Stem

C

Leaf

D

Flower.

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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.

Why is root said to be positively geotropic ?

Why is root said to be positively geotropic ?

Primary root is : 1. Positively geotropic 2. Positively hydrotropic 3. Negatively geotropic 4. Negatively hydrotropic Code:

Exampe of positive geotropism is

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