MCQ (Practice) - Ecosystem (Level 1)


90 Questions MCQ Test | MCQ (Practice) - Ecosystem (Level 1)


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This mock test of MCQ (Practice) - Ecosystem (Level 1) for Class 12 helps you for every Class 12 entrance exam. This contains 90 Multiple Choice Questions for Class 12 MCQ (Practice) - Ecosystem (Level 1) (mcq) to study with solutions a complete question bank. The solved questions answers in this MCQ (Practice) - Ecosystem (Level 1) quiz give you a good mix of easy questions and tough questions. Class 12 students definitely take this MCQ (Practice) - Ecosystem (Level 1) exercise for a better result in the exam. You can find other MCQ (Practice) - Ecosystem (Level 1) extra questions, long questions & short questions for Class 12 on EduRev as well by searching above.
QUESTION: 1

The pyramid of numbers is inverted in the case of

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QUESTION: 2

The type of food chain in which organic matter decomposed is converted into energy rich compounds is called -

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QUESTION: 3

One of Eltonian pyramids have to be upright always -

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QUESTION: 4

Word 'ecosystem' was coined by -

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QUESTION: 5

Biotic components include -

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QUESTION: 6

The last organisms of the food chain are generally-

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QUESTION: 7

In an ecosystem, the population of -

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QUESTION: 8

An aquatic ecosystem consists of -

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QUESTION: 9

The best arrangement of an energy system consisting of hawks, snakes, mice and grasses is -

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QUESTION: 10

If a big fish eats small fish which eats Hydra who in turn eats water fleas ; water fleas in turn eat phytoplankton. In this chain, water fleas will be -

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QUESTION: 11

The graphic representation of trophic level is represented by a pyramid. Which of the following pyramid is always a true pyramid unlike the others ?

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QUESTION: 12

Which of the following constitutes the structure of an ecosystem ?

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QUESTION: 13

Ecosystem comprises both abiotic and biotic components. Biotic component of an ecosystem consists of -

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QUESTION: 14

Autotrophic organisms (green plants), which capture solar energy to synthesise organic food are called -

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QUESTION: 15

In a pyramid of numbers representing an ecosystem of a large freshwater pond the number of primary consumers is -

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QUESTION: 16

Food chain refers to -

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QUESTION: 17

The sequence of species through which theorganic molecules in community pass is called is -

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QUESTION: 18

A group of interconnected food chains is called -

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QUESTION: 19

The energy which is utilized by the living world is primarily -

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QUESTION: 20

Energy flow in ecosystem is -

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QUESTION: 21

The rate at which new tissues are formed in producers is the ecosystem's -

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QUESTION: 22

How much amount of light is used in the production process by plants ?

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QUESTION: 23

The importance of ecosystem maintenance lies in -

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QUESTION: 24

The amount of energy, utilized by herbivores from the plants is -

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QUESTION: 25

The percentage of net primary production of total light intake is -

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QUESTION: 26

The flow of materials and energy in an ecosystem is respectively -

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QUESTION: 27

Mark the incorrect statement with reference to carbon cycle -

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QUESTION: 28

Major reservior of carbon in biosphere is lies in -

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QUESTION: 29

Biogeochemical cycling means -

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QUESTION: 30

The least productive ecosystem is -

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QUESTION: 31

One of the following is sedimentary cycle ?

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QUESTION: 32

The primary consumers in a pond ecosystem is -

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QUESTION: 33

The number of primary producers within a specified area would be minimum in -

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QUESTION: 34

The river mouth ecosystem is called as -

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QUESTION: 35

In a natural ecosystem, decomposers include-

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QUESTION: 36

Which of the following is not true for man made ecosytems ?

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QUESTION: 37

Lotic ecosystem refers to -

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QUESTION: 38

The ecosystem of a pond is referred to as -

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QUESTION: 39

The correct sequence of components through which energy may pass from initial source, through an ecosystem is -

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QUESTION: 40

The major resorvior of phosphorous cycle is-

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QUESTION: 41

Efficiency of any ecosystem is best depicted by pyramid of -

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QUESTION: 42

The correct match is -

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QUESTION: 43

The first trophic level in any kind of food chain is always a green plant because -

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QUESTION: 44

The creating force of an any ecosystem is -

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QUESTION: 45

When frog eats grasshopper which thrives on green plants, the frog is -

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QUESTION: 46

The largest ecosystem in the world is contributed by -

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QUESTION: 47

If the primary producers are absent from any ecosystem which of the following will occur ?

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QUESTION: 48

Grasshopper in grassland is a -

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QUESTION: 49

The pyramid of number for forest ecosystem is -

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QUESTION: 50

They can be put in the category of primary consumers -

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QUESTION: 51

The study of fresh water ecology is -

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QUESTION: 52

The place where fresh water joins the salt water is called as -

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QUESTION: 53

The word standing crop in ecosystem refers to -

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QUESTION: 54

The pyramid of energy in any ecosystem is-

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QUESTION: 55

Which of the following organisms can convert ammonium or nitrates into amino acids ?

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QUESTION: 56

The pyramid of energy in a food chain is:

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QUESTION: 57

The decomposers in an ecosystem constitute the following trophic level -

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QUESTION: 58

If all the green plants were to disappear from the earth -

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QUESTION: 59

The bacteria which attack the dead animals are -

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QUESTION: 60

The number of producers and consumers in an ecosystem is mutually controlled by a -

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QUESTION: 61

The non-green plants are as important as the green plants because they -

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QUESTION: 62

The ecosystem of earth is known as -

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QUESTION: 63

In any given ecosystem, the number of individuals of a species remain more or less constant over a period of time. This constancy of numbers is maintained by -

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QUESTION: 64

The ecosystem exists in a state of 'balance'. Supposing one of the heterotrophs, says the rabbit, multiplies and increases in number suddenly then -

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QUESTION: 65

Which of the following is not characteristic of a ecosystem -

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QUESTION: 66

The amount of living matter present in acomponent population of a particular trophic level is called as -

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QUESTION: 67

Which of the following is the smallest unit ?

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QUESTION: 68

The term reducer is applied to -

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QUESTION: 69

In a parasitic food chain which trophic level is represented by bugs and lices ?

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QUESTION: 70

The pyramid of number in a forest ecosystem is -

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QUESTION: 71

The pyramid of biomass in a parasitic ecosystem is -

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QUESTION: 72

The pyramid of biomass in a shallow pond ecosystem is -

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QUESTION: 73

The cybernetic of an ecosystem refers to -

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QUESTION: 74

The gross production minus respiration losses by plants in an ecosystem is indicated as-

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QUESTION: 75

The biotic and abiotic components of the ecosystem are connected through -

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QUESTION: 76

The rate of storage at consumer level is -

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QUESTION: 77

The CO2 is returned to the atmosphere by-

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QUESTION: 78

A group of interacting living things and all the environmental factors with which they interact are together called -

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QUESTION: 79

An ecosystem does not normally alter because it is in a state of -

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QUESTION: 80

The immediate surroundings of an organism are called -

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QUESTION: 81

Raymond Lindmann (1942) used the term trophic level. Trophic levels are formed by -

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QUESTION: 82

Organisms which acquire energy and nutrients by digesting the organic molecules of living organisms are called -

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QUESTION: 83

Which of the following is the trophic level of man in an ecosystem ?

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QUESTION: 84

The rate at which new tissues are formed in producers is called the primary net productivity of the ecosystem. About how much of the net primary productivity of a terrestrial ecosystem is eaten and digested by herbivores ?

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QUESTION: 85

Net community productivity (NCP) is the -

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QUESTION: 86

A food chain consists of -

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QUESTION: 87

The herbivores that feed directly on producers are called -

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QUESTION: 88

Within the ecosystem, energy is transferred from organism to organism in the form of -

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QUESTION: 89

The rate at which light energy is converted to chemical energy of organic molecules is the ecosystem's -

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QUESTION: 90

Producers in an ecosystem are -

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