BIO 102 | Study Mode

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Question 71
A
nonbiodegradable pollution
B
biodegradable pollution
C
effluents
D
air pollution
Explanation
Domestic waste constitutes biodegradable pollution. These are also called non-conservative pollutants. These are decomposed chemically or by activity of microorganisms into harmless products and are recycled back into the atmosphere.

Correct option: A
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Question 72
A
ozone and dust
B
CO2 and CO
C
SO2 and CO
D
SO2 and NO2.
Explanation
SO2 and NO when present in large quantities dissolved in water vapour form sulphuric acid and nitric acid which dissolve in rain water resulting in acid rain (H2SO4) and (HNO3) which in turn causes great damage to forests and vegetation.

Correct option: D
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Question 73
A
nonrenewable nonconventional energy source
B
nonrenewable conventional energy source
C
renewable nonconventional energy source
D
renewable conventional energy source.
Explanation
Conventional energy resources are those energy resources which are in common use, e.g. animal power, fuel wood, fossil fuel and hydroelectric energy. These conventional energy resources are non-renewable resources.

A non-renewable resource is a natural resource that cannot be re-made, re-grown or regenerated on a sea!: comparative to its consumption. It exists in a fixed amount that is being renewed or is used up faster than it can be made by nature. Often fossil fuels, such as coal, petroleum, and natural gas are considered non-renewable resources, as they do not naturally re-form at a rate that makes the way we use them sustainable.


Correct option: B
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Question 74
A
biomass
B
coal
C
petroleum
D
kerosene.
Explanation
A natural resource qualifies as a renewable resource if it is replenished by natural processes at a rate comparable to its rate of consumption by humans or other users. Biomass, in the energy production industry, refers to living and recently dead biological material which can be used as fuel or for industrial production.

Most commonly, biomass refers to plant matter grown for use as biofuel, but it also includes plant or animal matter used for production of fibres, chemicals or heat. Biomass may also include biodegradable wastes that can be burnt as fuel. Renewable resources of energy include biomass energy and some forms of inexhaustible energy like solar energy, hydropower, wind power, tidal energy, wave energy, geothermal energy, etc. Coal, petroleum and kerosene are non-renewable resources of energy.


Correct option: A
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Question 75
A
tendency of biological systems to change with change in environment
B
tendency of biological systems to resist change
C
disturbance of self regulatory system and natural controls
D
biotic materials used in homeopathic medicines.
Explanation
The ability to maintain a steady state within constantly changing environment is essential for the survival of living systems. The maintenance of a constant internal environment is called homeostasis.

Correct option: B
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Question 76
A
sand and zinc
B
gravel and calcium
C
clay and humus
D
silt and earthworm.
Explanation
Deep black soil is productive due to high proportion of clay and humus. The organic matter present in the soil is contributed by the death and decay of living organisms. These are the richest in nutrients and therefore these soils are the most fertile.

Correct option: C
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Question 77
A
surface water
B
hygroscopic water
C
gravitational water
D
capillary water.
Explanation
The spaces between the soil particles may be occupied by water or air. The rain water fills all the pore spaces as it moves downward under the influence of gravity however very small pore spaces serve as capillaries allowing the water to move against the pull of gravity, this is called capillary water and is available to the roots.

Some water forms an extremely thin, tightly held film around the soil particles; it is termed as hygroscopic water. Some water vapour is there in the soil pore spaces. The downward moving water is called gravitational water.


Correct option: D
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Question 78
A
commensalism when none of the interacting populations affect each other
B
symbiosis when the interaction is useful to both the populations
C
symbiosis when neither populations affects each other
D
commensalism when the interaction is useful to both the populations.
Explanation
When the interactions is useful to both the populations it is called symbiosis. Symbiosis means living together. It is beneficial co-action between two or more different species in which one or both species are benefitted and neither species is harmed.

Correct option: B
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Question 79
A
parasitic food chain
B
detritus food chain
C
consumer food chain
D
predator food chain.
Explanation
The dead organic matter of plant or animal is called as detritus. While a part of it remains on the soil surface as litter, the other part enters the soil. Many animals such as protozoans, nematodes, insects etc. depend on detritus and hence they are called as detrivores. Even the human beings are detrivores when they eat cooked food. From detritus, the chain proceeds to detrivores, then to carnivores and finally to top carnivores.

Correct option: B
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Question 80
A
grass > chamelion > insect > bird
B
grass > fox > rabbit bird
C
phytoplankton > zooplankton > fish
D
fallen leaves > bacteria > insect larvae.
Explanation
The process of transfer of energy from producers through a series of organisms, i.e., from primary consumers to secondary consumers and from secondary consumers to tertiary consumers by process of eating and being eaten constitute a food chain. The correct food chain is phytoplankton > zooplankton > fish.

Correct option: C

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