Strategies for Enhancement in Food Production

NEET Biology · 50 questions · Page 5 of 5 · Click an option or "Show Solution" to reveal answer

Q41

The technique of obtaining large number of plantlets by tissue culture method is called:

A Macropropagation

B Organ culture

C Plantlet culture

D Micropropagation

Correct Answer

Option D

Solution

Micropropagation is the latest method of obtaining large numbers of plantlets from small plant tissue culture explants.

Q42

India's wheat yield revolution in the 1960s was possible primarily due to:

A Hybrid seeds

B Quantitative trait mutations

C Increased chlorophyll content

D Mutations resulting in plant height reduction

Correct Answer

Option B

Solution

Green revolution was possible due to hybridization involving quantitative trait selection for yield.

Q43

Before the European invaders which vegetable was absent in India?

A Simla mirch and Brinjal

B Bitter gourd

C Maize and chichinda

D Potato and Tomato

Correct Answer

Option D

Solution

Potato and tomato are new world crops originating from Peru. They were brought to India by European invaders.

Q44

Which fish selectively feeds on larvae of mosquito?

A Clarias

B Rohu

C Exocoetus

D Gambusia

Correct Answer

Option D

Solution

Gambusia affinis selectively feeds on mosquito larvae and is used as a larvicidal fish for biological control of mosquitoes.

Q45

Triticale is obtained by crossing wheat with

A Barley

B Rye

C Oat

D Maize

Correct Answer

Option B

Solution

Triticale is produced by crossing wheat (Triticum aestivum) and Rye (Secale cereale).

Q46

Which statement is correct about honey bee?

A Workers are the smallest of the three castes

B Wax is waste material of honey bee

C Drone of honey bee is diploid

D A. indica is largest wild honey bee

Correct Answer

Option A

Solution

Workers are the smallest of the three castes (queen, drone, worker).

Apis dorsata is the largest honey bee.

Drone is haploid.

Q47

Coconut milk is used in tissue culture in which cytokinin is present:

A Auxin

B Gibberellin

C Ethylene

D Cytokinin

Correct Answer

Option D

Solution

Coconut milk contains the cytokinin zeatin and can initiate and sustain proliferation of tissues in culture.

Q48

What is the correct sequence for somatic hybridization?

A Isolation of protoplasts, fusion, culture, plant regeneration

B Culture, isolation, fusion, plant regeneration

C Fusion, isolation, culture, plant regeneration

D Isolation, culture, fusion, plant regeneration

Correct Answer

Option A

Solution

Somatic hybridization: isolate single cells → digest cell walls → isolate protoplasts → fuse protoplasts → grow hybrid to form plant.

Q49

Which of the following is a kharif crop in India?

A Wheat

B Barley

C Maize

D Mustard

Correct Answer

Option C

Solution

Maize is an important kharif crop of India. Wheat, barley and mustard are rabi crops.

Q50

In plant tissue culture, the capacity of a plant cell to give rise to a whole plant is called:

A Competence

B Totipotency

C Differentiation

D Dedifferentiation

Correct Answer

Option B

Solution

Totipotency is the capacity of a plant cell to give rise to a whole plant. This forms the basis of tissue culture.

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