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Biology MCQ

Biodiversity, Conservation and Environmental Issues · Maharashtra Board STD 12 (MSBSHSE - Semi English Medium). 219 questions.

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MCQ 11 Mark
CFC are air polluting agents which are produced by
  • A
    Diesel trucks
  • ✓
    Jet planes
  • C
    Rice fields
  • D
    Industries
Answer
Correct option: B.
Jet planes
Jet planes
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MCQ 21 Mark
The term “terror of Bengal’ is used for
  • A
    algal bloom
  • ✓
    water hyacinth
  • C
    increased BOD
  • D
    eutrophication
Answer
Correct option: B.
water hyacinth
water hyacinth
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MCQ 31 Mark
Which of the following factors will favour species diversity?
  • ✓
    Invasive species
  • B
    Glaciation
  • C
    Forest canopy
  • D
    Co-extinction
Answer
Correct option: A.
Invasive species
Invasive species
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MCQ 41 Mark
Select odd one out on the basis of Ex situ conservation.
  • ✓
    Zoological park
  • B
    Tissue culture
  • C
    Sacred groves
  • D
    Cryopreservation
Answer
Correct option: A.
Zoological park
Zoological park
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MCQ 51 Mark
Observe the graph and select the correct option.Image
  • A
    Line A represents, S = CA²
  • B
    Line B represents, log C = log A + Z log S
  • ✓
    Line A represents, $S=C A^Z$
  • D
    Line B represents, log S = log Z + C log A
Answer
Correct option: C.
Line A represents, $S=C A^Z$
Line A represents, $S=C A^Z$
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MCQ 61 Mark
Name the award declared by Government of India to motivate people for protecting wildlife.
  • A
    Amrita Devi-Bishnoi Tree Protection Award.
  • ✓
    Amrita Devi – Bishnoi Wildlife Protection Award.
  • C
    Amrita Devi-Chipko Movement Award.
  • D
    Bahuguna – Chipko Movement Award.
Answer
Correct option: B.
Amrita Devi – Bishnoi Wildlife Protection Award.
Amrita Devi – Bishnoi Wildlife Protection Award.
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MCQ 71 Mark
Which policy is introduced by Government of India to conserve forests effectively with local people ?
  • A
    Wildlife protection
  • B
    Chipko movement
  • ✓
    Joint forest movement
  • D
    Joint tree plantation
Answer
Correct option: C.
Joint forest movement
Joint forest movement
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MCQ 81 Mark
What is snow-blindness cataract ?
  • A
    Cataract noticed in people living in snow clad areas.
  • B
    Cataract that shows symptom of white dense patch.
  • ✓
    Cataract resulted due to inflammation of cornea.
  • D
    Cataract that causes total blindness.
Answer
Correct option: C.
Cataract resulted due to inflammation of cornea.
Cataract resulted due to inflammation of cornea.
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MCQ 91 Mark
UV-B does not cause ……………………
  • A
    aging of skin
  • B
    damage to skin cells
  • C
    various types of skin cancers
  • ✓
    albinism or lightning of the skin
Answer
Correct option: D.
albinism or lightning of the skin
albinism or lightning of the skin
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MCQ 101 Mark
‘Good ozone’ is found in the while the bad ozone is in ………………….
  • A
    Mesosphere, Ionosphere
  • B
    Mesosphere, Troposphere
  • ✓
    Stratosphere, Troposphere
  • D
    Stratosphere, Ionosphere
Answer
Correct option: C.
Stratosphere, Troposphere
Stratosphere, Troposphere
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MCQ 111 Mark
What is exactly measured in Dobson units or DU?
  • ✓
    The thickness of the ozone in a column of air from the ground to the top of the Atmosphere.
  • B
    The noise level in the circumscribed area.
  • C
    The amount of chlorofluorocarbons.
  • D
    The hole in the ozone umbrella.
Answer
Correct option: A.
The thickness of the ozone in a column of air from the ground to the top of the Atmosphere.
The thickness of the ozone in a column of air from the ground to the top of the Atmosphere.
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MCQ 121 Mark
Which are the four most affected aspects due to climate change caused due to global warming?
  • A
    Energy, Agricultural research, Sewage disposed, Entertainment.
  • ✓
    Food supply, Water, Health, Infrastructure.
  • C
    Political views, Equality, Natural Resources, Safety of women.
  • D
    Education, Empowerment of people, Shelter, Processed food.
Answer
Correct option: B.
Food supply, Water, Health, Infrastructure.
Food supply, Water, Health, Infrastructure.
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MCQ 131 Mark
Montreal Protocol aims at ……………………
  • A
    Biodiversity conservation
  • B
    Control of water pollution
  • C
    Control of CO2 emission
  • ✓
    Reduction of ozone depleting substances
Answer
Correct option: D.
Reduction of ozone depleting substances
Reduction of ozone depleting substances
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MCQ 141 Mark
Clouds and gases reflect about ………………… of the incoming solar radiation.
  • A
    one half
  • ✓
    one-fourth
  • C
    one tenth
  • D
    three-fourth
Answer
Correct option: B.
one-fourth
one-fourth
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MCQ 151 Mark
Why naturally occurring greenhouse effect is important?
  • ✓
    It maintains the temperature of earth at average 15 °C.
  • B
    It maintains the temperature of earth at 18 °C.
  • C
    It maintains lot of greenery on the surface of the earth.
  • D
    It maintains level of ozone in atmosphere.
Answer
Correct option: A.
It maintains the temperature of earth at average 15 °C.
It maintains the temperature of earth at average 15 °C.
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MCQ 161 Mark
Which is the chief reason of global warming ?
  • ✓
    Greenhouse effect
  • B
    Absorption of UV radiations by ozone
  • C
    Effect of visible light
  • D
    Trapping of radio waves
Answer
Correct option: A.
Greenhouse effect
Greenhouse effect
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MCQ 171 Mark
The two gases making highest relative contribution to the greenhouse gases are
  • ✓
    $CO _2$ and $CH _4$
  • B
    $CH _4$ and $N _2 O$
  • C
    $CFCs$ and $N _2 O$
  • D
    $CO _2$ and $N _2$
Answer
Correct option: A.
$CO _2$ and $CH _4$
 $CO _2$ and $CH _4$
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MCQ 181 Mark
Which one of the following is the correct percentage of the two (out of the total of 4) greenhouse gases that contribute to the total global warming ?
  • ✓
    CFCs $14 \%$, Methane $20 \%$
  • B
    $CO _2 40 \%, CFCs 30 \%$
  • C
    $N _2 O 6 \%, CO _2 86 \%$
  • D
    Methane $20 \%, N _2 O 18 \%$
Answer
Correct option: A.
CFCs $14 \%$, Methane $20 \%$
CFCs $14 \%$, Methane $20 \%$
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MCQ 191 Mark
Greenhouse effect is warming due to
  • A
    infra-red rays reaching earth
  • B
    moisture layer in the atmosphere
  • ✓
    increase in temperature due to increase in carbon dioxide concentration of the atmosphere
  • D
    ozone layer in the atmosphere
Answer
Correct option: C.
increase in temperature due to increase in carbon dioxide concentration of the atmosphere
increase in temperature due to increase in carbon dioxide concentration of the atmosphere
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MCQ 201 Mark
Which metals are recovered from recycling of E-waste ?
  • ✓
    Copper, iron, silicon, nickel and gold.
  • B
    Platinum, aluminium, silicon, silver and rhodium.
  • C
    Sodium, iron, silicon, uranium and potassium.
  • D
    Copper, radium, zinc, cobalt and titanium.
Answer
Correct option: A.
Copper, iron, silicon, nickel and gold.
Copper, iron, silicon, nickel and gold.
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MCQ 211 Mark
For treatment of e-waste, which is the most suitable solution ?
  • ✓
    Recycling and recovery
  • B
    Buried in landfills
  • C
    Incineration
  • D
    Disposal and storage in open
Answer
Correct option: A.
Recycling and recovery
Recycling and recovery
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MCQ 221 Mark
Which is valid suggestion for responsible citizen to deal with managing non- biodegradable waste ?
  • A
    Mixing of biodegradable and recyclable waste material.
  • B
    Mixing of biodegradable and non- biodegradable waste material.
  • C
    Use of more and more disposable material.
  • ✓
    Use of cloth bags and avoid plastic carry bags.
Answer
Correct option: D.
Use of cloth bags and avoid plastic carry bags.
Use of cloth bags and avoid plastic carry bags.
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MCQ 231 Mark
Which is appropriate method for disposal of hospital wastes ?
  • A
    Sanitary landfills
  • B
    Open dumps
  • ✓
    Use of incinerators
  • D
    Composting
Answer
Correct option: C.
Use of incinerators
Use of incinerators
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MCQ 241 Mark
From the following, which is a recyclable waste ?
  • A
    Food waste
  • ✓
    Newspaper
  • C
    Leather
  • D
    Rubber
Answer
Correct option: B.
Newspaper
Newspaper
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MCQ 251 Mark
From the following, which is not a category of sorting of waste ?
  • A
    Recyclable
  • B
    Biodegradable
  • C
    Non-biodegradable
  • ✓
    Explosive
Answer
Correct option: D.
Explosive
Explosive
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MCQ 261 Mark
Which is adverse effect of sanitary land fill noticed occasionally?
  • A
    Breeding place for rats and flies.
  • ✓
    Seepage of chemicals polluting ground water.
  • C
    Burning of hazardous waste.
  • D
    Accumulation of biodegradable materials.
Answer
Correct option: B.
Seepage of chemicals polluting ground water.
Seepage of chemicals polluting ground water.
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MCQ 271 Mark
Which statement correctly describes the process of waste disposal in sanitary landfill ?
  • A
    Solid wastes are dumped in a trench or depression.
  • B
    Solid wastes are dumped in a depression and compacted.
  • ✓
    Solid wastes are dumped in a trench, compacted and covered by soil.
  • D
    Solid wastes are dumped in a trench and burnt to reduce volume.
Answer
Correct option: C.
Solid wastes are dumped in a trench, compacted and covered by soil.
Solid wastes are dumped in a trench, compacted and covered by soil.
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MCQ 281 Mark
What is the appropriate scientific method for waste disposed ?
  • A
    Land fill
  • B
    Open burning dump
  • ✓
    Sanitary landfill
  • D
    Open dumps (Junk yards)
Answer
Correct option: C.
Sanitary landfill
Sanitary landfill
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MCQ 291 Mark
Biochemical Oxygen Demand (BOD) may not be a good index for pollution of water bodies receiving effluents from
  • A
    domestic sewage
  • B
    dairy industry
  • ✓
    petroleum industry
  • D
    sugar industry
Answer
Correct option: C.
petroleum industry
petroleum industry
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MCQ 301 Mark
Which method was commonly practised for managing solid waste generated by municipal bodies ?
  • A
    Open dumps
  • ✓
    Open burning dumps
  • C
    Accumulation in trenches
  • D
    Accumulation in water bodies
Answer
Correct option: B.
Open burning dumps
Open burning dumps
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MCQ 311 Mark
Sewage drained into water bodies kill fishes because
  • A
    excessive carbon dioxide is added to water
  • B
    it gives off a bad smell
  • C
    it removes the food eaten by the fish
  • ✓
    it increases competition fishes for dissolved oxygen
Answer
Correct option: D.
it increases competition fishes for dissolved oxygen
it increases competition fishes for dissolved oxygen
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MCQ 321 Mark
Which river of India is considered as an unending sewer ?
  • A
    Mula in Pune
  • B
    Panchaganga in Kolhapur
  • ✓
    Ganga from Haridwar to Kolkata
  • D
    Patalganga in Panvel
Answer
Correct option: C.
Ganga from Haridwar to Kolkata
Ganga from Haridwar to Kolkata
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MCQ 331 Mark
When huge amount of sewage is dumped into a river, its BOD will
  • ✓
    increase
  • B
    decrease
  • C
    sharply decrease
  • D
    remain unchanged
Answer
Correct option: A.
increase
increase
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MCQ 341 Mark
High value of BOD (Biochemical Oxygen Demand) indicates that
  • A
    consumption of organic matter in the water is higher by the microbes
  • B
    water is pure
  • ✓
    water is highly polluted
  • D
    water is less polluted
Answer
Correct option: C.
water is highly polluted
water is highly polluted
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MCQ 351 Mark
Measuring Biochemical Oxygen Demand (BOD) is a method used for
  • ✓
    estimating the amount of organic matter in sewage water.
  • B
    working out the efficiency of oil driven automobile engines.
  • C
    measuring the activity of Saccharomyces cerevisae in producing curd on a commercial scale.
  • D
    working out the efficiency of RBCs about their capacity to carry oxygen.
Answer
Correct option: A.
estimating the amount of organic matter in sewage water.
estimating the amount of organic matter in sewage water.
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MCQ 361 Mark
Eutrophication is caused by
  • A
    acid rain
  • ✓
    nitrates and phosphates
  • C
    sulphates and carbonates
  • D
    $CO _2$ and CO
Answer
Correct option: B.
nitrates and phosphates
nitrates and phosphates
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MCQ 371 Mark
Choose the incorrect statement from the following statements
  • A
    Ecological sanitation is a sustainable system for handling human excreta.
  • B
    One can save lot of water if flush is not used for sanitation.
  • C
    Ecological sanitation is a practical, hygienic, efficient and cost-effective solution to human waste disposed.
  • ✓
    Human excreta cannot be recycled into any resource or natural and safe fertilizer.
Answer
Correct option: D.
Human excreta cannot be recycled into any resource or natural and safe fertilizer.
Human excreta cannot be recycled into any resource or natural and safe fertilizer.
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MCQ 381 Mark
Which of the statement is incorrect with reference to thermal waste water ?
  • A
    Thermal wastewater eliminates or reduces the number of organisms sensitive to high temperature.
  • B
    Thermal wastewater may enhance the growth of plants and fish in extremely cold areas.
  • C
    Thermal wastewater causes damage to the indigenous flora and fauna.
  • ✓
    Thermal waste water is not an important category of pollutants.
Answer
Correct option: D.
Thermal waste water is not an important category of pollutants.
Thermal waste water is not an important category of pollutants.
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MCQ 391 Mark
Which major pollutant is released from electricity generating units ?
  • ✓
    heated water
  • B
    arsenic
  • C
    cadmium
  • D
    ammonia
Answer
Correct option: A.
heated water
heated water
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MCQ 401 Mark
Choose the correct statement
  • A
    Concentration of DDT in the water declined with the passing time.
  • B
    Concentration of DDT in the water remains the same over many years without any effect.
  • C
    If concentration of DDT starts at 0.003 ppb in water, it can ultimately reach 25 ppm in fish-eating birds.
  • D
    If concentration of DDT is 25 ppm in water, in fish-eating bird population it reduces to 0.003 ppb later.
Answer
If concentration of DDT starts at 0.003 ppb in water, it can ultimately reach 25 ppm in fish-eating birds
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MCQ 411 Mark
Which two substances are well-known for biomagnification ?
  • ✓
    Mercury and DDT
  • B
    Cadmium and Lead
  • C
    Petroleum hydrocarbons and sewage
  • D
    Paper manufacturing effluents and copper
Answer
Correct option: A.
Mercury and DDT
Mercury and DDT
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MCQ 421 Mark
Which is world’s most problematic aquatic weed ?
  • A
    Hydrilla
  • B
    Pistia
  • ✓
    Eichhornia crassipes
  • D
    Duckweed
Answer
Correct option: C.
Eichhornia crassipes
Eichhornia crassipes
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MCQ 431 Mark
When there are excessive microorganisms in the water that cause biodegradation there is
  • A
    sharp rise in the dissolved oxygen content
  • ✓
    sharp decline of dissolved oxygen content
  • C
    refreshing odour to the water
  • D
    loss of algal population
Answer
Correct option: B.
sharp decline of dissolved oxygen content
sharp decline of dissolved oxygen content
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MCQ 441 Mark
What is the outcome of algal bloom ?
  • A
    Lots of algae available for fodder.
  • B
    Deterioration of water quality and fish mortality.
  • C
    Cleaning up of the ambient water.
  • D
    Decrease in BOD amount.
Answer
Deterioration of water quality and fish mortality
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MCQ 451 Mark
A mere ………………… impurities make water contaminated with domestic sewage unfit for human use.
  • A
    $0.8 \%$
  • B
    $0.7 \%$
  • C
    $0.5 \%$
  • ✓
    $0.1 \%$
Answer
Correct option: D.
$0.1 \%$
$0.1 \%$
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MCQ 461 Mark
When was Water (Prevention and Control of Pollution) Act passed by the Government of India ?
  • ✓
    1974
  • B
    1984
  • C
    1986
  • D
    1992
Answer
Correct option: A.
1974
1974
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MCQ 471 Mark
Sound becomes hazardous noise pollution at level
  • A
    above 30 dB
  • ✓
    above 80 dB
  • C
    above 100 dB
  • D
    above 120 dB
Answer
Correct option: B.
above 80 dB
above 80 dB
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MCQ 481 Mark
dB is the standard abbreviation used for the quantitative expression of
  • A
    the density of bacteria in a medium
  • ✓
    a particular pollutant
  • C
    the dominant Bacillus in a culture
  • D
    a certain pesticide
Answer
Correct option: B.
a particular pollutant
 a particular pollutant
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MCQ 491 Mark
To what decibel level noise rises during festive seasons due to crackers ?
  • A
    20 dB
  • B
    50 dB
  • ✓
    100 dB
  • D
    150 dB
Answer
Correct option: C.
100 dB
100 dB
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MCQ 501 Mark
How much decibel sound is produced by the jet plane or rocket ?
  • A
    50 dB
  • B
    80 dB
  • ✓
    150 dB
  • D
    200 dB
Answer
Correct option: C.
150 dB
150 dB
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