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Free Download as PDF of the detailed solutions for class 12 Biology from NCERT or CBSE text book as per exam pattern, to help you in day to day learning. We provide all important questions and answers from chapter Organisms and Populations of Biology.
(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
(3)
Adaptation to low temperature and freezing in animals occurs due to the production of
[1]
Chaperonins
[2]
Proline
[3]
Antifreeze
[4]
Alanine
(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
(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
(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
(9)
Climate includes
[1]
Seasonal variation
[2]
General patterns of atmosphere conditions
[3]
Average weather of an area
[4]
All of these
(10)
The maintenance of relatively constant internal environment is called
[1]
Homeostasis
[2]
Exotherms
[3]
Homeobox
[4]
Endotherms
(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
(12)
Competition is severe in a population that has a distribution which is
[1]
Random
[2]
Uniform
[3]
Irregular
[4]
Non-random
(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
(15)
Which factor of ecosystem includes plants, animals and microorganisms?
[1]
Biotic factors
[2]
Direct factors
[3]
Indirect factors
[4]
Abiotic factors
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