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Ecosystem 1.

Primary Source of Energy for all life on earth is a) Sun

2.

c) Stars

d) Water

_______________ are organisms that break down and obtain energy from dead organic matter. a) Producers

3.

b) Moon

b)

Decomposers c)

Autotrophs

d)

Herbivores

During _______________, autotrophs use light energy to convert carbon dioxide and water into oxygen and energy-rich carbohydrates such as sugars and starches. a) Chemosynthesis

4.

b) Photosynthesis

c) Evaporation

d) nitrogen fixation

A(n) ________________ is a diagram that shows the relative amounts of energy or matter contained within each trophic level in a food chain or food web. a) ecological pyramid

5.

b) biosphere

c) biome

d) green revolution

An organism that obtains energy by eating animals are known as _______________. a) carnivore b) herbivore c) detritivore d) producer

6.

Which of the following are producers? a) Carnivores

7.

b) Herbivores

b) Producers & Consumers

c) Abiotic & Biotic Components

Process by which plants make food‌.. a) Photosynthesis

9.

d) None of these

Main Components of Ecosystem are a) Animals & Plants

8.

c) Plants

b) Chemosynthesis

c) Phylosynthesis

__________ start the food web. a) Grass

b) Deer

c) Mouse

d) Lion

d) None of these


10.

A food chain depicts a) Food transfer

11.

b) Tastes

c) Energy flow

d) None of these

River is a ____________________ ecosystem. a) Marine Ecosystem b) Pond Ecosystem c) Freshwater Ecosystem d) all of these

12.

Dark Zone of sea is called ___________ a) Profundal Zone b) Littoral Zone

13.

d) Lithospheric Zone

b) Xerosere

c) Lithosere

d) None of these

b) Xerosere

c) Lithosere

d) None of these

b) Xerosere

c) Lithosere

d) None of these

b) Succession

c) Transference

d) Displacement

c) Parasites

d) Copepods

c) Parasites

d) Copepods

Microscopic floating plants ________ a) Phytoplankton

20.

c) Limnetic Zone

To give space to other ecosytems is_______________ a) Replacement

19.

b) Littoral Zone

When mountain ecosystem is replaced by other ecosystems the succession is ____________ a) Hydrosere

18.

d) Lithospheric Zone

When desert ecosystem is replaced by forest ecosystem the succession is ____________ a) Hydrosere

17.

c) Limnetic Zone

When aquatic ecosystem is replaced by land ecosystem the succession is ____________ a) Hydrosere

16.

b) Littoral Zone

Zone where effective light reaches is called ________________ a) Profundal Zone

15.

d) Lithospheric Zone

Zone that starts from surface to nearly 6m deep is called ____________ a) Profundal Zone

14.

c) Limnetic Zone

b) Zooplankton

Microscopic floating animals________ a) Phytoplankton

b) Zooplankton


21.

Incomplete ecosystem is found in ____________ a) Forests

22.

d) Rivers

d) Desert

c) Deep Ocean

c) High Mountains

d) Desert

b) Marine Ecosystem

c) Freshwater Ecosystem d) All of these

Alpine grass is found in ___________ a) Deserts

26.

b) Mountains

Salts are abundant in ________ a) Pond Ecosystem

25.

d) Desert

Flat and big leaves are found in _____________ a) Rainforest

24.

c) Deep Oceans

Animals that adapt in adverse situations are found in __________ a) Forests

23.

b) Mountains

b) Rivers

c) Mountains

d) None of these

Eusterite ecosystem is found in__________ a) Union of River and Ocean b) Union of River and Lake c) Union of River and Pond d) Union of River and Desert

27.

The word ecology was first proposed by a zoologist named ___________ a) E. Haeckel

28.

d) Hilaire

b) Two directional

c) Multidirectional

d) None of these

Which of the following is an inorganic component a) Protein

30.

c) M. E Clark

Energy flow in food web is a) One directional

29.

b) Geoffroy

b) Carbohydrate

c) Glucose

d) Nitrogen

Pyramid of number in a grassland ecosystem is a) Always inverted

b) Always upright

c) Both a) and b)

d) Spindle shaped


31.

Pick up the correct food chain a) grass___chameleon___insect___bird b) grass___fox____rabbit___bird c) phytoplankton___zooplankton___fish d) Fallen leaves___bacteria____insect

32.

Pyramid of number deals with a) Species in area b) Subspecies in community c) Individuals in community d) Individuals in a trophic level

33.

The food relation from grass__deer__tiger__decomposer is called a) food chain b) food web c) trophic level

34.

The energy transferred to the next level a) decreases b) increases

35.

b) Producers

b) Remains unchanged

d) Herbivores

c) Vertical

d) Variable

Abiotic components include a) Atmosphere

38.

c) Chemotrophs

The pyramid of energy in a food chain is a) Inverted

37.

c) Remains the same d) None

The first order consumers are called a) Autotrophs

36

d) energy flow

b) Hydrosphere

The pyramid of number is inverted in the case of a) parasitic food chain b) Grassland ecosystem c) Forest ecosystem d) lake ecosystem

c) Lithosphere

d) all of these


39.

Pyramid of energy in terrestrial ecosystem is a) upright

40.

b) inverted

c) spindle shaped

Upper part of sea/aquatic ecosystem contains (a) plankton (b) nekton (c) plankton and nekton (d) benthos.

41.

What is true of ecosystem? (a) primary consumers are least dependent upon producers (b) primary consumers out-number producers (c) producers are more than primary consumers (d) secondary consumers are the largest and most powerful.

42.

The dominant second trophic level, in a lake ecosystem, is (a) phytoplankton (b) zooplankton (c) benthos (d) plankton.

43.

In a biotic community, the primary consumers are (a) detritivores (b) herbivores (c) carnivores (d) omnivores.

44.

Which of the following is the most stable ecosystem? (a) mountain (b) ocean

45.

(c) forest

(d) desert.

The sequence of energy flow through a food chain is a . primary consumers- producers- higher order consumers. b . producers- higher order consumers- primary consumers. c . higher order consumers- primary consumers- producers. d . primary consumers- higher order consumers- producers. e . producers- primary consumers- higher order consumers.

d) irregular


ecosystem-mcq