MCQ Questions for Class 11 Geography Chapter 15 Life on the Earth with Answers

I. Choose the correct answer

Question 1.
Name the largest terrestrial community of plants and animals in interaction with the environment
(a) biome
(b) forest
(c) ecosystem
(d) none of these

Answer

Answer: (a) biome.


Question 2.
Name the famous animal of savanna of Australia
(a) monkey
(b) giraffe
(c) kangaroos
(d) none of these

Answer

Answer: (c) kangaroo


Question 3.
Which biome supports the greatest variety of hoofed herbivore species?
(a) savanna
(b) tropical Savanna
(c) taiga
(d) tundra

Answer

Answer: (b) tropical Savanna.


Question 4.
The other name of Mediterranean scrub forest is
(a) chapparal
(b) prairies
(c) grassland
(d) none of these

Answer

Answer: (a) chapparal.


Question 5.
Name the grassland of South Africa
(a) steppes
(b) prairies
(c) chapparal
(d) velds

Answer

Answer: (d) velds


Question 6.
Name the tropical forest in India
(a) tundra
(b) tarai
(c) steppes
(d) none of these

Answer

Answer: (b) tarai.


Question 7.
The sun-loving woody climbers on trees, espcially in tropical rain forests are known as
(a) lianas
(b) grassland
(c) velds
(d) tarai

Answer

Answer: (a) lianas.


Question 8.
The interacting system of the biotic community and the physical environment is known as
(a) ecosystem
(b) biosphere
(c) biome
(d) none of these

Answer

Answer: (a) ecosystem.


Question 9.
Name the multicellular animal consumers
(a) animalia
(b) annelida
(c) homosapiens
(d) none of these

Answer

Answer: (a) animalia.


Question 10.
The imbalance in ecosystem is caused by
(a) man
(b) natural disasters
(c) both of these
(d) none of these

Answer

Answer: (c) both of these.


Question 11.
Give the name to the negative interaction of organisms within the biotic environment:
(a) succession
(b) competition
(c) interrelation
(d) none of these

Answer

Answer: (b) competition.


Question 12.
The mutually beneficial association of two dissimilar organisms is known as
(a) mutualism
(b) food web
(c) pyramid
(d) food chain

Answer

Answer: (a) mutualism.


Question 13.
What name is given to the network of food chains?
(a) pyramid
(b) tropical levels
(c) food levels
(d) food web

Answer

Answer: (d) food web.


Question 14.
Name the second order consumers like tiger which depend on flesh for food
(a) herbivores
(b) carnivores
(c) producers
(d) none of these

Answer

Answer: (b) carnivores.


Question 15.
The green plants which produce carbohydrates by photosynthesis are known as
(a) producers
(b) herbivores
(c) both of them
(d) none of them

Answer

Answer: (a) producers.


Question 16.
Each step in the food chain of organisms is known as
(a) trophic level
(b) pyramid
(c) food chain
(d) none of these

Answer

Answer: (a) trophic level.


Question 17.
Name the multicellular decomposers
(a) algae
(b) fungi
(c) mosses
(d) none of these

Answer

Answer: (b) fungi.


Question 18.
The shallow zone of life at the earth’s surface is known as
(a) atmosphere
(b) biosphere
(c) hydrosphere
(d) none of these

Answer

Answer: (b) biosphere.


Question 19.
Which one is the geochemical element of the biosphere?
(a) nitrogen
(b) oxygen
(c) carbon
(d) all of these

Answer

Answer: (d) all of these.


Question 20.
Which element is the essential constituent of amino acids, nucleic acids, proteins, etc.?
(a) oxygen
(b) carbon
(c) nitrogen
(d) none of these

Answer

Answer: (c) nitrogen.


Question 21.
By which process the bacteria converts nitrates into free nitrogen
(a) nitrification
(b) photosynthesis
(c) nitration
(d) denitrification

Answer

Answer: (d) denitrification.


Question 22.
All living organisms maintain circulation of water in solid, liquid or gaseous state, referred to as
(a) hydrologic cycle
(b) carbon cycle
(c) oxygen cycle
(d) water cycle

Answer

Answer: (a) hydrologic cycle.


Question 23.
How many types of biogeochemical cycles are there?
(a) three
(b) two
(c) four
(d) none of these

Answer

Answer: (b) two.


Question 24.
Name the main by-product of photosynthesis
(a) carbon
(b) hydrogen
(c) oxygen
(d) water

Answer

Answer: (c) oxygen.


Question 25.
Oxygen combines with nitrogen to form
(a) nitrates
(b) nitrogen oxide
(c) both of them
(d) none of these

Answer

Answer: (c) both of them.


II. Fill up the blanks with suitable words

Question 1.
The …………….. is made up of ……………. and ……………. elements.

Answer

Answer: environment, abiotic, biotic


Question 2.
Ecosystems are of two types, …………….. and ……………

Answer

Answer: terrestrial, aquatic


Question 3.
Ecology is the study of earth as a …………….. of plants, animals and …………….

Answer

Answer: household, micro-organisms


Question 4.
…………….. can be classified as marine and freshwater.

Answer

Answer: Aquatic ecosystem


Question 5.
Biotic factors include the producers, ……………., …………….., ………………. and the ……………..

Answer

Answer: primary consumers, secondary consumers, tertiary consumers, decomposers


Question 6.
Transfer of energy that occurs during the process of a food chain from one level to another is known as …………….

Answer

Answer: flow of energy


Question 7.
This inter-connecting network of species is known as ……………

Answer

Answer: food web


Question 8.
…………… occur in eastern North America, north eastern Asia and in western and central Europe.

Answer

Answer: Temperate forests


Question 9.
Temperate grasslands are called ………………

Answer

Answer: Steppes


Question 10.
……………. of ocean water provides precipitation.

Answer

Answer: Evaporation


 


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