NCERT Multiple Choice Questions and Answers of Biology from Chapter Organisms and Populations | Organisms and Populations Questions and Answers of Class 12 Biology | Biology - Organisms and Populations MCQs | NCERT Solution of Class 12 Biology Organisms and Populations

Questions

31 Individuals of a species which occur in a particular area constitute

1 Population

2 Fauna

3 Flora

4 Flora and Fauna

View Answer

Answer: Population

32 CAM helps the plants in

1 Reproduction

2 Conserving water

3 Secondary growth

4 Disease resistance

View Answer

Answer: Conserving water

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33 Upper layer of water in a single body of water is known as

1 Hypolimnion

2 Epilimnion

3 thermocline

4 Hydroline

View Answer

Answer: Epilimnion

34 The role of an organism in the ecological system is known as

1 Niche

2 Habitat

3 Herbivory

4 Interaction

View Answer

Answer: Interaction

35 The abundance of a species population within its habitat is called

1 Relative density

2 Regional density

3 Absolute density

4 Niche density

View Answer

Answer: Niche density

36 A terrestrial animal must be able to

1 Excrete large amounts of salts in urine

2 Actively pump salts out through the skin

3 Conserve water

4 Excrete large amount of water in urine

View Answer

Answer: Conserve water

37 Information about birth rate, death rate, sex ratio, age distribution etc. of a population is obtained from

1 Mortality rate

2 Life table

3 Natality table

4 Both (1) and (3)

View Answer

Answer: Life table

38 Which of the followings is not the characteristic of the anatomy of xerophytes?

1 Well developed conducting tissue

2 Spongy parenchyma

3 Thick cuticle

4 Well developed mechanical tissue

View Answer

Answer: Spongy parenchyma

39 The lower limit of water availability is soil is known as

1 field capacity

2 Hypolimnion

3 thermocline

4 wilting point

View Answer

Answer: wilting point

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