CBSE Class 12 Organisms and Populations Multiple Choice Questions with Answers. MCQ Questions Class 12 Organisms and Populations with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT MCQ questions Class 12 Organisms and Populations with Answers to know their preparation level.
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MCQ Questions Class 12 Organisms and Populations with Answers - Set - 5
Question 1:
Carnivorous animals lions and leopards, occupy the same niche but lions predate mostly larger animals and leopards take smaller ones. This mechanism of competition is referred to as
(a) character displacement
(b) altruism
(c) resource partitioning
(d) competitive exclusion.
Correct Answer – (C)
Question 2:
Homeostasis is
(a) tendency of biological systems to change with change in environment
(b) tendency of biological systems to resist change
(c) disturbance of self regulatory system and natural controls
(d) biotic materials used in homeopathic medicines
Correct Answer – (B)
Question 3:
Which of the following communities is more vulnerable to invasion by outside animals and plants?
(a) Temperate forests
(b) Oceanic island communities
(c) Mangroves
(d) Tropical evergreen forests
Correct Answer – (D)
Question 4:
In Urn shaped age pyramid of the population the trend of growth is
(a) Rapid
(b) Stable
(c) Declining
(d) Stationary
Correct Answer – (C)
Question 5:
Animals have the innate ability to escape from predation. Examples for the same are given below. Select the incorrect example.
(a) Colour change in Chamaeleon
(b) Enlargement of body size by swallowing air in puffer fish
(c) Poison fangs in snakes
(d) Melanism in moths
Correct Answer – (C)
MCQ Questions Class 12 Organisms and Populations With Answers
Question 6:
A population of 500 that experiences 55 births and 5 deaths during a one-year period. What is the reproductive rate for the population during the one-year period ?
(a) 0.01/year
(b) 0.05/year
(c) 0.1/year
(d) 50/year
Correct Answer – (C)
Question 7:
The sum total of the populations of the same kind of organisms constitute
(a) colony
(b) genus
(c) community
(d) species.
Correct Answer – (D)
Question 8:
Plants such as Prosopis, Acacia and Capparis represent examples of tropical
(a) deciduous forests
(b) evergreen forests
(c) grasslands
(d) thorn forests.
Correct Answer – (D)
Question 9:
In which one of the following habitats does the diurnal temperature of soil surface vary most?
(a) Shrub land
(b) Forest
(c) Desert
(d) Grassland
Correct Answer – (C)
Question 10:
Praying mantis is a good example of
(a) camouflage
(b) mullerian mimicry
(c) warning colouration
(d) social insects.
Correct Answer – (A)
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