Chapter-Life On The Earth

Important MCQ-Based Questions for class 11 Geography chapter-Life On The Earth

This page consists of Important MCQ questions from the chapter Life On The Earth uploaded as per the CBSE syllabus and consists of a detailed explanation. Questions are prepared from the entire chapter Life On The Earth to give you effective revision. 

Find below MCQ-Based Questions for class 11 Geography chapter-Life On The Earth

Important MCQ-based questions Geography class 11 chapter-Life On The Earth Set-A

Geography - MCQ on Life On The Earth

Class XI

Q.1. An ecosystem is:

a) A system of life.

b) A system consisting of biotic and abiotic components.

c) A system of animals.

d) None

Answer:

(b) A system consisting of biotic and abiotic components.

Q.2.Total assemblage of plants and animals under specific climatic conditions is called:

a) A community

b) A forest

c) A biome

d) A region

Answer:

(c) A biome

Q.3.Which one of the following is not a major biome:

a) Forest

b) Grassland

c) Agricultural fields

d) Desert

Answer:

(c) Agricultural fields

Q.4.Which one of the following is not a marine ecosystem:

a) Oceans

b) Estuaries

c) Coral reefs

d) Marshes

Answer:

(d) Marshes

Q.9. Fresh water ecosystems are:

a) Lakes

b) Ponds

c) Streams

d) Atolls

Answer:

(d) Atolls

Exp. Atoll is a coral reef and it is included in marine ecosystem.

Q.10.Abiotic components of the environment are:

a) Rainfall

b) Temperature

c) Soil

d) The decomposers

Answer:

(d) The decomposers

Q.11.The interconnecting network of species is known as:

a) Food chains

b) Food web

c) Food hub

d) Food cycle

Answer:

(c) Food hub

Q.12. Altitudinal are found in the:

a) Deserts

b) Valleys

c) Grasslands

d) Mountains

Answer:

(d) Mountains

Q.13.The cyclic movements of chemical elements of the biosphere between the organisms and the environment are called:

a) Bio-cycles

b) Chemical cycle

c) Bio-chemical cycle

d) Bio-geo chemical cycle

Answer:

(d) Bio-geo chemical cycle

Q.14. The basic element of all living organisms is:

e) Nitrogen

f) Water

g) Oxygen

h) Carbon

Answer:

(d) Carbon

Q.15. ------is the basic constituent of all the organic compounds.

a) Oxygen

b) Carbon

c) Nitrogen

d) None

Answer:

(b) Carbon

Q.16.Which one of the following is not a compound of Nitrogen.

a) Amino acid

b) Nucleic acid

c) Proteins

d) Cellulose

Answer:

(d) Cellulose

Exp. Cellulose is a carbohydrate.

Q.17. Which one of the following is included in biosphere?

a) Only plants

b) All living and nonliving organisms.

c) All living organisms

d) Only animals

Answer:

(c) All living organisms

Q.18.Tropical grasslands are also known as:

a) The Prairies

b) The Savannas

c) The Steppes

d) None of the above

Answer:

(b) The Savannas

Q.19. Oxygen combines with iron found in the rocks to form:

a) Iron carbonate

b) Iron oxides

c) Iron nitrates

d) Iron sulphate

Answer:

(b) Iron oxides

Q.20. During photosynthesis, carbon dioxide combines with water in the presence of sunlight to form:

a) Proteins

b) Carbohydrates

c) Amino acids

d) Vitamins

Answer:

(b) Carbohydrates

Q.21. Ecosystems are of two types they are:

a) Marine & Fresh water

b) Terrestrial and aquatic

c) Atmospheric and Lithospheric

d) None

Answer:

(b) Terrestrial and aquatic

Q.22. Terrestrial ecosystem can be divided into:

a) Regions

b) Biomes

c) Bio geo systems

d) Bio – mass

Answer:

(b) Biomes

Q.23. Which one of the following is not a primary consumer:

a) Deer

b) Goats

c) Mice

d) Tigers

Answer:

(d) Tigers

Q.24. The most important decomposers are:

a) Micro organisms

b) Protozoa

c) Bacteria

d) Animals

Answer:

(a) Micro organisms

Important MCQ-based questions Geography class 11 chapter-Life On The Earth Set-B

Q.1 The boundaries of different biomes on land are determined mainly by:

a. climate

b. temperature

c. human activities

d. None of the above

Answer:

(a)

Explanation. A biome is plant and animal community that is spread over large geographical area.

Q.2 Freshwater ecosystem includes:

a. lakes

b. ponds

c. streams

d. All of the above

Answer:

(d)

Explanation. It falls under the category of aquatic ecosystem.

Q.3 Atmosphere consists of ------ of nitrogen.

a. 22%

b. 79%

c. 88%

d. 75%

Answer:

(b)

Explanation. It is the major constituent of atmospheric gases.

Q.4 Mineral salts come directly from:

a. earth’s crust

b. water cycle

c. atmosphere

d. All of the above

Answer:

(a)

Explanation. It comes by weathering.

Q.5 Abiotic factors include:

a. rainfall

b. temperature

c. sunlight

d. All of the above

Answer:

(d)

Explanation. All ecosystems consist of biotic and abiotic factors.

Q.1 Temperate Steppe is a sub type of which biome:

a. Forest

b. Desert

c. Grassland

d. Aquatic

Answer:

(c)

Explanation. It is in parts of Eurasia and North America.

Q.2 Which type of soil does the Desert biome have?

a. Porous with thin layer of humus

b. Rich in nutrients with little organic matter

c. Acidic, poor in nutrients

d. None

Answer:

(b)

Explanation. It has scanty vegetation.

Q.3 The main by-product of photosynthesis is:

a. carbon dioxide

b. hydrogen

c. oxygen

d. None of the above

Answer:

(c)

Explanation. Oxygen occurs in a number of chemical forms and combinations.