Biology Chapter No.11 Ecosystem 2nd Year Online Quiz MCQs Test pdf

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Chapter Name : ECOSYSTEM
Chapter No. 11 
Second Year
Multiple Choice Questions
Note : All MCQ’s selected in this test are from OLD F.Sc. board , UHS and PMC(Pakistan Medical Commission) Islamabad Papers.

Book Name :  Biology
Chapter No. 11
Chapter Name : ECOSYSTEM
Total MCQ from Text Book :  83
Book Version  :

Published By : Punjab Text Book Board Lahore
Approved By : Govt of the Punjab and Federal Ministry for Education
Test Type : MCQ
Exam conduct By : Inter Boards of Sindh, KPK, Balochistan, AJK, Gilgit Baltistan, Punjab & Federal 
Class / Grade  : 12th ( F.Sc. Intermediate)
Total Marks : 83
Total Time :  83 minutes



1 / 83

The role played by an individual in a communtiy is :

2 / 83

The change In structure of community of an ecosystem during a time

3 / 83

A loclized group of individuals belonging to the same species is called as :

4 / 83

The total energy from sun is trapped by producer in an ecosystem is:

5 / 83

Synecology is also known as the

6 / 83

Study of single population relationship to its environments is called

7 / 83

The bacteria In the root nodules fix nitrogen and convert it into:

8 / 83

Group of individuals which can interbreed & produce organisms of their own kind form a:

9 / 83

The living organisms which can prepare their own food are:

10 / 83

Balance of ecosystem is kept by:

11 / 83

A symbiotic relationship that benefits one species & neither helps nor harms the other is called:

12 / 83

10.Food chains combine to form:

13 / 83

How does a predators react to population density of prey?

14 / 83

The study of relationships of organisms to their environment is known as:

15 / 83

7."Atrno" means:

16 / 83

One of the following is an example of predator-prey relationship:

17 / 83

The succession which occur in dry soil or rock is:

18 / 83

The total energy from sun is trapped by producer in an ecosystem is:

19 / 83

Which one of the following is a parasite:

20 / 83

In 1917, term niche was first proposed by AmericanOrnithologist named

21 / 83

Which one is responsible for the conversion of nitrites into nitrates ?

22 / 83

The actual location of place, where an organism lives is called Its:

23 / 83

A group of inter-breeding individuals, beloging to same species and sharing a common geophraphic area, is called :

24 / 83

Production of new organic matter at the consumers level is called :

25 / 83

The bacteria in the root nodules fix nitrogen and convert it into:

26 / 83

The total production of organic matter by green plants minus respiratory loss is called :

27 / 83

C.Eton defined the Niche as the species

28 / 83

Biome is a :

29 / 83

Microorganisms while use protein, release ammonia. This process is:

30 / 83

8."Litho" means:

31 / 83

Consumer that preys other animals is known as:

32 / 83

Study of relationship of different communities to environment is called:

33 / 83

5.The relationship of a single population towards its environment is called:

34 / 83

The major compononts of ecosystem are:

35 / 83

Diseases in living organisms caused by parasites are called:

36 / 83

Climax is the establishment of

37 / 83

The abiotic component of an ecosystem is :

38 / 83

In ecosystem the word teco is related to:

39 / 83

The succession in pond is called:

40 / 83

The term niche was proposed by:

41 / 83

During energy transformation at different trophic leVels, the energy lost as heat is in range:

42 / 83

If population of predator increases then population of prey.

43 / 83

A change In the community, structure of an ecosystem over a period of time is :

44 / 83

The process in which micro-organisms use the proteins and amino acids and release ammonia of ammonium ions is known as :

45 / 83

Elements required in large amounts are called:

46 / 83

Nitrogen is balanced by:

47 / 83

All the food chains begin with:

48 / 83

Which one of the following refers to commensalisms:

49 / 83

In a grassland food chain, what is the correct sequence:

50 / 83

Who proposed the term Niche in Ecology:

51 / 83

In each case succession is initiated by a few hardy invaders called:

52 / 83

Grazera feeds on:

53 / 83

Which one of the following is autotroph:

54 / 83

Lithosphere includes:

55 / 83

Succession starts on dry soil is called:

56 / 83

Charles Eton defined the niche as the species's :

57 / 83

Land lifeless structure is referred by the stage:

58 / 83

6.The study of growth responses of plant is called:

59 / 83

What is the net production of the total photosynthate after the use by plants themselves?

60 / 83

One of the following is an example of predator-prey relationship:

61 / 83

In xerosere, Polytrichum and tortula represent:

62 / 83

Lichens are an example of :

63 / 83

The distinct levels or link of food chain are called:

64 / 83

The seral stages of a primary succession are:

65 / 83

The relationship between insects and flowering plants is the example of

66 / 83

Moss stage is represented by :

67 / 83

9.Fungi as well as bacteria are generally known as:

68 / 83

When bacteria in soil oxidize ammonia or ammonium ions, this Is called:

69 / 83

Which one of the following is an ectoparasite:

70 / 83

Of the total sunlight that strikes the earth, what amount of it is absorbed by photosynthetic machinery?

71 / 83

The actual location of place, where an organism lives is called Its:

72 / 83

The animal that is caught and eaten is called :

73 / 83

An association between two organisms by which both are benefited is called:

74 / 83

Once nitrate enters the plant cell it is reduced as:

75 / 83

Group of interbreeding organisms residing together in space & time are:

76 / 83

Intfestations are the diseases which are caused by _______ in living organisms.

77 / 83

Who defined the niche as the species occupation ?

78 / 83

4.Layer of earth where life is present is called:

79 / 83

The bacteria living in the root nodules of the legume plants serve to fix atmospheric.

80 / 83

3.Regional ecological community of plants & animals form:

81 / 83

Herbaceous stage in xerosere is the

82 / 83

Primary succession starting in a pond is called:

83 / 83

In which of the following from nitrogen enters into plant bodies ?

Your score is

The average score is 49%


[mtouch 160]


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