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Most roots are positively geotropic. The...

Most roots are positively geotropic. The negatively geotropic are

A

prop roots

B

floating roots

C

climbing roots

D

respiratory roots

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Verified by Experts

The correct Answer is:
D
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Explore conceptually related problems

Consider the given statement regarding roots and choose the option having most correct statement I epiphytic roots are hygroscopic II climbing roots of ficus pumila secrete a gummy substance to stick to the support III roots are positively geotropic negatively phototropic and negatively hydrotopic IV cells of zone of elongation in a root loose their power to divide Choose the correct option

Root shows negative geotropic in

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

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

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

Why is root said to be positively geotropic ?

(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 shown negative geotropism. (c) Name one plant part which exhibits positive thigmotropism.

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.

Assertion: Presence of pneumatophores is a special adaptation of hydrophytes. Reason: Pneumatophores are positively geotropic shoots that have lenticels and help in gaseous exchange.

ARIHANT NEET-MORPHOLOGY OF FLOWERING PLANTS -Check point 11.6
  1. Most roots are positively geotropic. The negatively geotropic are

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