Man and His Environment in Biology topic based MCQs preparation test for all competitive exam. Man and His Environment in Biology Chapter# 21, 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 40 MCQs and try their best to cover the whole topic Man and His Environment 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 Man and His Environment 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 - Balance in the nutrient cycle can be upset when
All of these
2 - In air nitrogen is
0.79
3 - In air % of oxygen and carbon dioxide is
Oxygen 20%, CO2 0.03%
4 - Water constitutes --% of body weight?
70-90%
5 - Which statement is true?
1% as fresh water lakes, streams and rivers
6 - Total area of the world under cultivation is
0.11
7 - Wild life refers to
Both b and c
8 - Endangered species are
Reduced in number
9 - ______% of our energy requirements are met from fossil fuels
95
10 - Hydroelectricity is generated by using ______ of falling water.
Kinetic energy
11 - Driving force for all the cycles in ecosystem is
Sun
12 - Tides are caused by
Gravitational pull of sun
13 - Wind blows from area of
High pressure to low pressure
14 - Geothermal energy is
Heat energy trapped underground
15 - Hot substance is escaped from inside the earth in the form of
All of these
16 - In oceans of tropical regions
Temp of surface water is 25?C and 5?C at depth
17 - Study of human population and things that affect them is
Demography
18 - Rate of population growth in 1980s was
0.02
19 - Replantation of plants in the areas where they were present earlier is called
Reforestation
20 - Establishment of new forests where no forests existed previously is called
Aforestation
21 - Which is environmental buffer?
Forests
22 - About half of the rain which falls in tropical forests comes from
Transpiration of plants
23 - Biodiversity is
Total number of species in an ecosystem
24 - Which statement is not true about ozone?
O2
25 - Ozone depletion is commonly caused by
CFCs
26 - Diseases caused by UV rays in humans
Both a and b
27 - Which gas commonly causes green house effect?
Carbon dioxide
28 - Causes of green house effect are
All of these
29 - Sun rays are reradiated from the earth's surface in the form of
Long wave radiations
30 - Incomplete burning of carbon compounds cause release of
Carbon monoxide
31 - Acid rain is caused by
Both a and b
32 - Algal bloom is also called as
Eutrophication
33 - The chemical wastes from industry is called
Industrial effluents
34 - Pesticides and fertilizers are also called
Agrochemicals
35 - Which are more susceptible to attacks of pests?
Monocultures
36 - Which disease does not match its etiology?
Cholera is physical disorder
37 - Detergents usually release
Phosphates
38 - Diphtheria is
Pathogenic disease
39 - Which one the following is not nutritional disease?
Diabetes
40 - Unbroken series of organisms arranged from ancestor to descendant sequence is
Phyletic lineage
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