NCERT - Organisms and Populations Questions and Answers of Class 12 Biology | GkSeries

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Questions
1 Competition is most severe between two
1 Distantly related species growing in the same habitat
2 Closely related species growing in different niches
3 Closely related species growing in the same habitat
4 Distantly related species growing in different niches

Answer: Closely related species growing in the same habitat
2 Organisms having the potential for interbreeding and producing fertile offspring is called
1 Class
2 Order
3 Genus
4 Species

Answer: Species
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3 Adaptation to low temperature and freezing in animals occurs due to the production of
1 Chaperonins
2 Proline
3 Antifreeze
4 Alanine

Answer: Antifreeze
4 Insectivorous plants are adopted to soils
1 Deficient in nitrogenous compounds
2 Deficient in water
3 Rich in water
4 Deficient in trace elements

Answer: Deficient in nitrogenous compounds
5 A group of individuals of a plant or animal species, inhabiting a given area is called
1 Biome
2 Population
3 Ecosystem
4 Community

Answer: Population
6 When one animal copies the appearance, actions, or sounds of another animal to avoid predators, it is called
1 Mimicry
2 Commensalism
3 Competition
4 Symbiosis

Answer: Mimicry
7 Large Woody Vines are more commonly found in
1 Alpine forests
2 Temperate forests
3 Mangroves
4 Tropical rainforests

Answer: Tropical rainforests
8 Community is
1 Species structure and diversity index of an area
2 Biomass
3 Autotrophic and heterotrophic components
4 All of these

Answer: All of these
9 Climate includes
1 Seasonal variation
2 General patterns of atmosphere conditions
3 Average weather of an area
4 All of these

Answer: All of these
10 The maintenance of relatively constant internal environment is called
1 Homeostasis
2 Exotherms
3 Homeobox
4 Endotherms

Answer: Homeostasis
11 Organisms that can tolerate and thrive in a wide range of temperatures are called
1 Eukaryotic organisms
2 Stenothermal
3 Eurythermal
4 None of these

Answer: Eurythermal
12 Competition is severe in a population that has a distribution which is
1 Random
2 Uniform
3 Irregular
4 Non-random

Answer: Irregular
13 Pheromones, the chemical messengers produced by certain exocrine glands of skin, affect
1 Skin color
2 Breast
3 Genitalia
4 Mutual behaviour of members of a species

Answer: Mutual behaviour of members of a species
14 An association of individuals of different species living in the same habitat and having functional interactions is
1 Biotic community
2 Ecologic niche
3 Population
4 Ecosystem

Answer: Biotic community
15 Which factor of ecosystem includes plants, animals and microorganisms?
1 Biotic factors
2 Direct factors
3 Indirect factors
4 Abiotic factors

Answer: Biotic factors

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