Solved MCQs on Ecosystems.

1-A single bacterium in the soil interacts with

(A) The water

(B) Air

(C) Particles of soil around it

(D) All of the above

2-The region of earth, where life exists is known as

(A) Atmosphere

(B) Biosphere

(C) Lithosphere

(D) Hydrosphere

3-In the biosphere energy is received from

(A) The Sun

(B) The interior of the earth

(C) Both (A) and (B)

(D) Work

4-The Biosphere consists of the following

(A) Lakes

(B) Soils

(C) Solid sediments

(D) All of the above

5-In which of the following form(s), the waster products are discharged into the biosphere?

(A) Gaseous

(B) Liquid

(C) Solid

(D) All of the above

6-Ecosystem is smallest unit of

(A) Ionosphere

(B) Lithosphere

(C) Biosphere

(D) Mesosphere

7-Energy _____ in an Ecosystem.

(A) is released

(B) is absorbed

(C) flows

(D) None of the above

8-The set of ecosystems is called a

(A) Biome

(B) Climate

(C) Subsystem

(D) Structure

9-The following is an example of Terrestrial Biome

(A) Tropical rain forest

(B) Rivers

(C) Streams

(D) All of the above

10-Terrestrial biomes has a rapid exchange of

(A) Carbon dioxide

(B) Oxygen

(C) Water

(D) All of the above

ANSWERS:

1-(D), 2-(B), 3-(C), 4-(D), 5-(D), 6-(C), 7-(C), 8-(A), 9-(A), 10-(D)

11-The following is an example of lotic biome

(A) Rivers

(B) Lakes

(C) Oceans

(D) All of the above

12-The following is an example of lentic biome

(A) Rivers

(B) Lakes

(C) Oceans

(D) All of the above

13-The following is an example of marine biome

(A) Rivers

(B) Lakes

(C) Oceans

(D) All of the above

14-The smallest artificial ecosystems that have been known to sustain life over a long period of time are

(A) Folsom bottles

(B) Folsom pond

(C) Folsom stream

(D) None of the above

15-Ecosysems rely on the following major sources of energy

(A) Sun

(B) Chemical or Nuclear fuels

(C) Both (A) and (B)

(D) None of the above

16-The following type of ecosystems have a low productivity or capacity to do work

(A) Unsubsidized Natural Solar powered ecosystems

(B) Naturally Subsidized Solar powered ecosystems

(C) Man Subsidized Solar powered ecosystems

(D) Fuel powered ecosystems

17-The following type of ecosystems have high energy input

(A) Unsubsidized Natural Solar powered ecosystems

(B) Naturally Subsidized Solar powered ecosystems

(C) Man Subsidized Solar powered ecosystems

(D) Fuel powered ecosystems

18-Industrial parks are examples of

(A) Unsubsidized Natural Solar powered ecosystems

(B) Naturally Subsidized Solar powered ecosystems

(C) Man Subsidized Solar powered ecosystems

(D) Fuel powered ecosystems

19-A coastal estuary is an example of 

(A) Unsubsidized Natural Solar powered ecosystems

(B) Naturally Subsidized Solar powered ecosystems

(C) Man Subsidized Solar powered ecosystems

(D) Fuel powered ecosystems

20-Agriculture and Aquaculture are examples of

(A) Unsubsidized Natural Solar powered ecosystems

(B) Naturally Subsidized Solar powered ecosystems

(C) Man Subsidized Solar powered ecosystems

(D) Fuel powered ecosystems

ANSWERS:

11-(A), 12-(B), 13-(C), 14-(A), 15-(C), 16-(A), 17-(D), 18-(D), 19-(B), 20-(C)

21-The following type of ecosystem is of utmost importance from human point of view

(A) Unsubsidized Natural Solar powered ecosystems

(B) Naturally Subsidized Solar powered ecosystems

(C) Man Subsidized Solar powered ecosystems

(D) Fuel powered ecosystems

22-In which of the following ecosystems large volumes of air are purified?

(A) Unsubsidized Natural Solar powered ecosystems

(B) Naturally Subsidized Solar powered ecosystems

(C) Man Subsidized Solar powered ecosystems

(D) Fuel powered ecosystems

23-Every Ecosystem has ___ major component(s).

(A) One

(B) Two

(C) Three

(D) Four

24-The following is (are) Abiotic components of the ecosystem.

(A) Soil

(B) Carbon

(C) Protein

(D) All of the above

25- Humus is _____ factor of an Ecosystem.

(A) Physical

(B) Chemical

(C) Both (A) and (B)

(D) None of the above

26-The following is (are) Producer(s)

(A) Algae

(B) Green plants

(C) Photosynthetic bacteria

(D) All of the above

27-The autotrops

(A) are self nourishing organisms

(B) derive energy from sunlight

(C) make organic compounds from inorganic compounds

(D) All of the above

28-Autotropic components are

(A) Producers

(B) Consumers

(C) Decomposers

(D) None of the above

29-______ are Primary consumers.

(A) Herbivores

(B) Carnivores

(C) Omnivores

(D) All of the above

30-The following are dependent on others for food

(A) Autotrops

(B) Heterotrops

(C) Both (A) and (B)

(D) None of the above

ANSWERS:

21-(A), 22-(A), 23-(B), 24-(D), 25-(B), 26-(D), 27-(D), 28-(A), 29-(A), 30-(B)

31-______ are Secondary consumers.

(A) Herbivores

(B) Carnivores

(C) Omnivores

(D) All of the above

32-The following have vegetarian as well as non-vegetarian diet

(A) Herbivores

(B) Carnivores

(C) Omnivores

(D) All of the above

33-The following is(are) micro-consumers

(A) Bacteria

(B) Fungi

(C) Flagellates

(D) All of the above

34-Heterotropic components are

(A) Producers

(B) Consumers

(C) Decomposers

(D) None of the above

35-Grasshopper is a

(A) Herbivore

(B) Carnivore

(C) Omnivore

(D) None of the above

36-Snake is a

(A) Primary consumer

(B) Secondary consumers

(C) Tertiary consumers

(D) Quaternary consumers

37-The following is a Secondary consumer

(A) Goat

(B) Lizard

(C) Wolf

(D) Lion

38-The simple inorganic substances released into environment by the decomposers and then reused by the ______ .

(A) Producers

(B) Consumers

(C) Both (A) and (B)

(D) None of the above

39-In a pond, insects and small fishes are

(A) Primary Micro-consumers

(B) Secondary consumers

(C) Tertiary consumers

(D) None of the above

40-In the process of Photosynthesis, plants use chlorophyll to transform sunlight into _____ energy.

(A) Heat

(B) Chemical

(C) Light

(D) None of the above

ANSWERS:

31-(B), 32-(C), 33-(D), 34-(B), 35-(A), 36-(C), 37-(B), 38-(A), 39-(B), 40-(B)

41-Of the solar radiation that does reach the earth’s surface (incident energy), about ____ % is ultraviolet.

(A) 10

(B) 20

(C) 30

(D) 40

42-The following is the correct grazing food chain

(A) Grass – Grasshopper – Frog – Snake – Hawk

(B) Grass – Frog – Grasshopper– Snake – Hawk

(C) Grass – Grasshopper – Frog – Hawk – Snake

(D) Grass – Grasshopper – Snake – Frog – Hawk

43-Carnvores are at

(A) First trophic level

(B) Second trophic level

(C) Third trophic level

(D) Fourth trophic level

44-Which of the following is not a type of Ecological pyramid?

(A) The Pyramid of Numbers

(B) The Pyramid of Biomass

(C) The Pyramid of Energy

(D) The Pyramid of Food

45-The Pyramid of Biomass is based on

(A) The total dry weight

(B) Calorific value

(C) Total amount of living material

(D) All of the above

46-The following is (are) the cause(s) for Ecological succession.

(A) Biotic causes

(B) Climatic causes

(C) Continuing causes

(D) All of the above

47-The following succession are visible on sea-coasts

(A) Sand dune succession

(B) Bog succession

(C) Succession in Oceans

(D) All of the above

48-In Desert Ecosystem, Shrubs or Bushes are

(A) Producer organisms

(B) Consumers

(C) Decomposers

(D) None of the above

49-An estuary

(A) is rich in nutrients

(B) usually support an abundance of fish

(C) is area where river join the sea/ocean

(D) all of the above

50-The following is not a type of Ecosystem.

(A) Grassland Ecosystem

(B) Aquatic Ecosystem

(C) Desert Ecosystem

(D) Mountain Ecosystem

ANSWERS:

41-(A), 42-(A), 43-(C), 44-(D), 45-(D), 46-(D), 47-(A), 48-(A), 49-(D), 50-(D)