Ecosystem in Biology topic based MCQs preparation test for all competitive exam. Ecosystem in Biology Chapter# 20, topic based MCQs that are mostly asked in competitive exam related to Biology. Examtry team design a series of MCQs based tests that effectively and efficiently help a student or job seeker to prepare their exam effectively and efficiently.
Examtry team design more than 60 MCQs and try their best to cover the whole topic Ecosystem in Biology . These MCQs based test really helpful in all competitive exams as well as institutional exams. Anyone who wants to pass job test comprising one paper or MCQs based test come on examtry.com and get prepared himself.
MCQs under the topic of Ecosystem in Biology covers all tests conducted by FPSC, NTS, KPSC, PPSC, SPSC, BPSC, OTS, UTS, UPS, PTS, CTS, ATS, ETEA or any other institution.
1 - Major regional ecological community of plants and animals forms
Biomes
2 - The actual location or place where an organism lives is
Habitat
3 - The role a species plays in a community including behavior and influence is
Niche
4 - Study of a single population's relationship to its environment is called
Autecology
5 - The biosphere covers about
16-20 km
6 - Abiotic components include
All of these
7 - Which statement is true?
Fungi and bacteria are decomposers
8 - Sequence of changes in community and its non-living environment over a period of time is
Succession
9 - Plants growing in xeric conditions are called
Xerophytes
10 - Lichen and algae form
Pioneers community
11 - Diverse and stable community at the end of succession is
Climax community
12 - Secondary succession starts from
From remains of previous ecosystem
13 - Hydrosere is
Primary succession starting in a pond
14 - Mosses are
Tortula
15 - Wood forests form the
Climax community
16 - Disease in living organisms caused by parasites is called
Infestation
17 - Legume plants are the hosts to
Rhizobium
18 - A dual organism composed of symbiotic association of an alga living within a fungus myceliium is
Lichen
19 - Symbiosis relationship in which only one organism is benefited is
Commensalism
20 - Sharks may have small fish attached to them called
Remoras
21 - Over grazing leads to
Totally barren lands
22 - Nitrogen constitutes about ______ % of atmosphere
0.78
23 - Oxidation of ammonia or ammonium ions by bacteria in soil is called
Nitrification
24 - Gross primary production is
Total amount of energy fixed by all plants
25 - Plant biomass is
Both b and c
26 - Total solar energy trapped by the producers in an ecosystem is
0.01
27 - The major unit of ecology is
Ecosystem
28 - Eco' part of word ecosystem means
Environment
29 - Which of the following is not true for food web?
Starts with primary consumers
30 - Which one of the following is more tolerant to herbivore
Grasses
31 - Which of the following step of nitrogen cycle is not useful for plants
Denitrification
32 - Weather refers to
Both a and b
33 - Which statement about hydrospheric ecosystem is incorrect?
Salt water ecosystem covers about 75% earth surface
34 - Productivity of an ecosystem is indicated by
Both a and b
35 - In which zone plant community is most diverse
Littoral zone
36 - Which statement about profundal zone is correct?
Decomposers and detritus feeders inhabit it
37 - Eutrophication is
Adequate nutrition accelerated by human activities
38 - In polluted lake which organisms dominate the community
Blue green algae
39 - Evolution of vascular bundles in plants and skeleton in animals is an adaptation for
Terrestrial ecosystem
40 - Development of bark in plants and skin in animals is a method for
Reducing water loss
41 - Which statement is incorrect?
Coniferous forests located at high latitude are alpine
42 - Temperature of temperate deciduous forests is
4-30 degree C
43 - Coniferous forests located at high altitude are called
Alpine
44 - Grass land in tropic climates with woody trees is called
Savanna
45 - Zone of lake water which is of open water near the surface is
Limnetic
46 - Ecosystem of Shogran is
Temperate deciduous
47 - Mountains of Koh Hindukush come under
Tundra
48 - Annual rainfall in grass land is
250-750 mm
49 - One of the most important cause of desertification is
Deforestation
50 - End of earth' is related to
Tundra
51 - Desert ecosystem of Mianwali is
Thal
52 - In sub-humid tropical grassland productivity is more than
4000g/m2
53 - Annual rainfall in deserts is less than
250-500 mm
54 - Treeless tundra of high latitude between taiga and polar ice caps is called
Arctic tundra
55 - The most fragile of all biomes is
Tundra
56 - Which one is a non-renewable resource?
Natural gas
57 - Process that supplies food to living things through decaying and decomposition is called
Nutrient cycle
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