Question 1: Palette 1/92

NEET 2023 MCQ

Nitrates and phosphates flowing from agricultural farms into water bodies are a significant cause of :

A

Eutrophication

B

Humification

C

Mineralisation

D

Stratification

Question 2: Palette 2/92

NEET 2023 MCQ

What will happen if fresh water lake gets contaminated by addition of polluted water with high BOD?

A

Amount of dissolved oxygen in the lake will decrease

B

The lake will remain unaffected

C

Number of submerged aquatic plants in the lake will increase

D

Number of aquatic animals in the lake will increase

Question 3: Palette 3/92

NEET 2023 MCQ

Match List-I with List-II.

	List - I		List - II
(A)	Deforestation	(I)	Responsible for heating of Earth's surface and atmosphere
(B)	Reforestation	(II)	Conversion of forested areas to non-forested areas
(C)	Green-house effect	(III)	Natural ageing of lake by nutrient enrichment of its water
(D)	Eutrophication	(IV)	Process of restoring a forest that once existed but was removed

Choose the correct answer from the options given below :

A

A-(IV), B-(III), C-(II), D-(I)

B

A-(I), B-(II), C-(III), D-(IV)

C

A-(III), B-(I), C-(II), D-(IV)

D

A-(II), B-(IV), C-(I), D-(III)

Question 4: Palette 4/92

NEET 2023 MCQ

Select the correct statements regarding dissolved Oxygen and Biochemical Oxygen Demand.

(A) BOD is inversely related to dissolved oxygen.

(B) Low dissolved oxygen and high BOD lead to loss of aquatic life.

(C) High BOD leads to high dissolved oxygen.

(D) Both BOD and dissolved oxygen are indicator of health of a water body.

(E) Both BOD and dissolved oxygen are affected by amount of organic matter in the water body.

Choose the most appropriate answer from the options given below :

A

(A), (B), (C), (E) only

B

(A), (B), (D), (E) only

C

(A), (B), (C), (D) only

D

(B), (C), (D), (E) only

Question 5: Palette 5/92

NEET 2023 MCQ

The thickness of ozone in a column of air in the atmosphere is measured in terms of :

A

Decibels

B

Decameter

C

Kilobase

D

Dobson units

Question 6: Palette 6/92

NEET 2023 MCQ

Which of the following statements is correct?

A

Biomagnification refers to increase in concentration of the toxicant at successive trophic levels.

B

Presence of large amount of nutrients in water restricts ‘Algal Bloom’

C

Algal Bloom decreases fish mortality

D

Eutrophication refers to increase in domestic sewage and waste water in lakes.

Question 7: Palette 7/92

NEET 2023 MCQ

Given below are two statements:

Statement I: Electrostatic precipitator is most widely used in thermal power plant.

Statement II : Electrostatic precipitator in thermal power plant removes ionising radiations.

In the light of the above statements, choose the most appropriate answer from the options given below:

A

Both Statement I and Statement II are incorrect.

B

Statement I is correct but Statement II is incorrect.

C

Statement I is incorrect but Statement II is correct.

D

Both Statement I and Statement II are correct.

Question 8: Palette 8/92

NEET 2022 MCQ

Why CNG is considered better fuel than diesel?

(a) It can not be adulterated.

(b) It takes less time to fill the fuel tank

(c) It burns more efficiently.

(d) It is cheaper.

(e) It is less inflammable.

Choose the most appropriate answer from the options given below :

A

(c), (d), (e) only

B

(a), (b), (c), (e) only

C

(a), (c), (d) only

D

(a), (b), (d), (e) only

Question 9: Palette 9/92

NEET 2022 MCQ

The device which can remove particulate matter present in the exhaust from a thermal power plant is:

A

STP

B

Incinerator

C

Electrostatic Precipitator

D

Catalytic Convertor

Question 10: Palette 10/92

NEET 2022 MCQ

The entire fleet of buses in Delhi were converted to CNG from diesel. In reference to this, which one of the following statements is false?

A

CNG burns more efficiently than diesel

B

The same diesel engine is used in CNG buses making the cost of conversion low

C

It is cheaper than diesel

D

It cannot be adulterated like diesel

Question 11: Palette 11/92

NEET 2022 MCQ

Given below are two statements:

Statement I : In a scrubber the exhaust from the thermal plant is passed through the electric wires to charge the dust particles.

Statement II : Particulate matter (PM 2.5) cannot be removed by scrubber but can be removed by an electrostatic precipitator.

In the light of the above statements, choose the most appropriate answer from the options given below:

A

Both Statement I and Statement II are correct

B

Both Statement I and Statement II are incorrect

C

Statement I is correct but Statement II is incorrect

D

Statement I is incorrect but Statement II is correct

Question 12: Palette 12/92

NEET 2021 MCQ

Dobson units are used to measure thickness of :

A

Troposphere

B

CFCs

C

Stratosphere

D

Ozone

Question 13: Palette 13/92

NEET 2020 MCQ

Snow-blindness in Antarctic region is due to

A

High reflection of light from snow

B

Freezing of fluids in the eye by low temperature

C

Inflammation of cornea due to high dose of UV-B radiation

D

Damage to retina caused by infra-red rays

Question 14: Palette 14/92

NEET 2020 MCQ

Montreal protocol was signed in 1987 for control of

A

Disposal of e-wastes

B

Transport of Genetically modified organisms from one country to another

C

Emission of ozone depleting substances

D

Release of Green House gases

Question 15: Palette 15/92

NEET 2020 MCQ

In water hyacinth and water lily, pollination takes place by :

A

Insects and water

B

Water currents only

C

Insects or wind

D

Wind and water

Question 16: Palette 16/92

NEET 2019 MCQ

Which of these following methods is the most suitable for disposal of nuclear waste?

A

Dump the waste within rocks under deep ocean

B

Bury the waste within rocks deep below the Earth’s surface

C

Shoot the waste into space

D

Bury the waste under Antarctic ice-cover

Question 17: Palette 17/92

NEET 2019 MCQ

Due to increasing air-borne allergens and pollutants, many people in urban areas are suffering from respiratory disorder causing wheezing due to :

A

Proliferation of fibrous tissues and damage of the alveolar walls

B

Reduction in the secretion of surfactants by pneumocytes

C

Benign growth on mucous lining of nasal cavity

D

Inflammation of bronchi and bronchioles

Question 18: Palette 18/92

NEET 2019 MCQ

Which of the following pairs of gases is mainly responsible for green house effect?

A

Nitrogen and Sulphur dioxide

B

Carbon dioxide and Methane

C

Ozone and Ammonia

D

Oxygen and Nitrogen

Question 19: Palette 19/92

NEET 2019 MCQ

Which of the following protocols did aim for reducing emission of chlorofluorocarbons into the atmosphere?

A

Gothenburg Protocol

B

Geneva Protocol

C

Montreal Protocol

D

Kyoto Protocol

Question 20: Palette 20/92

NEET 2019 MCQ

Polyblend, a fine powder of recycled modified plastic, has proved to be a good material for :

A

Construction of roads

B

Making tubes and pipes

C

Making plastic sacks

D

use as a fertilizer

Question 21: Palette 21/92

NEET 2019 MCQ

Which one of the following equipments is essentially required for growing microbes on a large scale, for industrial production of enzymes?

A

Industrial oven

B

Bioreactor

C

BOD incubator

D

Sludge digester

Question 22: Palette 22/92

NEET 2018 MCQ

World Ozone Day is celebrated on

A

5^th June

B

21^st April

C

16^th September

D

22^nd April

Question 23: Palette 23/92

NEET 2018 MCQ

In stratosphere, which of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen?

A

Carbon

B

Cl

C

Fe

D

Oxygen

Question 24: Palette 24/92

NEET 2018 MCQ

Match the items given in column I with those in column II and select the correct option given below.

Column I	Column II
(A) Eutrophication	(i) UV-B radiation
(B) Sanitary landfill	(ii) Deforestation
(C) Snow blindness	(iii) Nutrient enrichment
(D) Jhum cultivation	(iv) Waste disposal

A

A	B	C	D
(ii)	(i)	(iii)	(iv)

B

A	B	C	D
(i)	(iii)	(iv)	(ii)

C

A	B	C	D
(iii)	(iv)	(i)	(ii)

D

A	B	C	D
(i)	(ii)	(iv)	(iii)

Question 25: Palette 25/92

NEET 2018 MCQ

Which of the following is a secondary pollutant?

A

CO

B

CO₂

C

SO₂

D

O₃

Question 26: Palette 26/92

NEET 2017 MCQ

Which one of the following statements is not valid for aerosols ?

A

They alter rainfall and monsoon patterns

B

They have negative impact on agricultural land

C

They cause increased agricultural productivity

D

They are harmful to human health

Question 27: Palette 27/92

NEET 2016 MCQ

A lake which is rich in organic waste may result in

A

mortality of fish due to lack of oxygen

B

increased population of fish due to lots of nutrients

C

increased population of aquatic organisms due to minerals

D

drying of the lake due to algal bloom

Question 28: Palette 28/92

NEET 2016 MCQ

The highest DDT concentration in aquatic food chain shall occur in

A

crab

B

Phytoplankton

C

eel

D

seagull

Question 29: Palette 29/92

NEET 2016 MCQ

Biochemical Oxygen Demand (BOD) may not be a good index for pollution for water bodies receiving effluents from

A

petroleum industry

B

sugar industry

C

domestic sewage

D

dairy industry

Question 30: Palette 30/92

NEET 2016 MCQ

Joint Forest Management Concept was introduced in India during :

A

1990s

B

1970s

C

1960s

D

1980s

Question 31: Palette 31/92

NEET 2016 MCQ

A river with an inflow of domestic sewage rich in organic waste may result in -

A

Death of fish due to lack of oxygen

B

Increased population of aquatic food web organisms

C

Drying of the river very soon due to algal bloom

D

An increased production of fish due to biodegradable nutrients

Question 32: Palette 32/92

NEET 2016 MCQ

Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers

A

Methane

B

Ozone

C

Nitrous oxide

D

Ammonia

Question 33: Palette 33/92

NEET 2015 MCQ

Which of the following are most suitable indicators of SO₂ pollution in the environment?

A

Conifers

B

Fungi

C

Algae

D

Lichens

Question 34: Palette 34/92

NEET 2015 MCQ

Acid rain is caused by increase in the atmospheric concentration of -

A

SO₃ and CO

B

CO₂ and CO

C

O₃ and dust

D

SO₂ and NO₂

Question 35: Palette 35/92

NEET 2015 MCQ

Eutrophication of water bodies leading to killing of fishes is mainly due to nonavailability of -

A

light

B

food

C

essential minerals

D

oxygen

Question 36: Palette 36/92

NEET 2015 MCQ

The UN conference of Parties on climate change in the year 2012 was held at :

A

Lima

B

Warsaw

C

Doha

D

Durban

Question 37: Palette 37/92

NEET 2015 MCQ

Increase in concentration of the toxicant at successive trophic levels is known as :

A

Biomagnification

B

Biotransformation

C

Biodeterioration

D

Biogeochemical cycling

Question 38: Palette 38/92

NEET 2015 MCQ

Rachel Carson's famous book "Silent Spring" is related to:

A

Population explosion

B

Pesticide pollution

C

Ecosystem management

D

Noise pollution

Question 39: Palette 39/92

NEET 2015 MCQ

The UN Conference of Parties on climate change in the year 2011 was held in :

A

Peru

B

Qatar

C

Poland

D

South Africa

Question 40: Palette 40/92

NEET 2015 MCQ

Which of the following is not one of the prime health risks associated with greater UV radiation through the atmosphere due to depletion of stratospheric ozone?

A

Increased liver cancer

B

Increased skin cancer

C

Damage to eyes

D

Reduced Immune System

Question 41: Palette 41/92

NEET 2015 MCQ

High value of BOD (Biochemical Oxygen Demand) indicates that :

A

water is highly polluted

B

consumption of organic matter in the water is higher by the microbes

C

water is pure

D

water is less polluted

Question 42: Palette 42/92

NEET 2014 MCQ

The zone of atmosphere in which the ozone layer is present is called :

A

Mesosphere

B

Stratosphere

C

Ionosphere

D

Troposphere

Question 43: Palette 43/92

NEET 2014 MCQ

A scrubber in the exhaust of a chemical industrial plant removes :

A

particulate matter of the size 5 micrometer or above

B

particulate matter of the size 2.5 micrometer or less

C

gases like ozone and methane

D

gases like sulphur dioxide

Question 44: Palette 44/92

NEET 2014 MCQ

A location with luxuriant growth of lichens on the trees indicates that the :

A

trees are very healthy

B

trees are heavily infested

C

location is highly polluted

D

location is not polluted

Question 45: Palette 45/92

NEET 2013 MCQ

Climate of the world is threatened by :

A

Decreasing amount of atmospheric carbon dioxide

B

Increasing concentration of atmospheric oxygen

C

Decreasing amount of atmospheric oxygen

D

Increasing amount of atmospheric carbon dioxide

Question 46: Palette 46/92

NEET 2013 MCQ

The second commitment period for Kyoto Protocol was decided at :

A

Doha

B

Cancun

C

Durban

D

Bali

Question 47: Palette 47/92

NEET 2013 MCQ

Which one of the following is not correct as regards the harmful effects of particulate matter of the size 2.5 micro meters or less ?

A

It can directly enter into our circulatory system

B

It can be inhaled into the lungs

C

It can cause respiratory problems

D

It can cause inflammation and damage to the lungs

Question 48: Palette 48/92

NEET 2013 MCQ

Global warming can be controlled by :

A

Increasing deforestation, slowing down the growth of human population

B

Reducing deforestation, cutting down use of fossil fuel

C

Increasing deforestation, reducing efficiency of energy usage

D

Reducing reforestation, increasing the use of fossil fuel

Question 49: Palette 49/92

NEET 2013 MCQ

The Air Prevention and control of pollution Act came into force in :

A

1985

B

1981

C

1990

D

1975

Question 50: Palette 50/92

NEET 2013 MCQ

Kyoto-Protocol was endorsed at :

A

CoP-6

B

CoP-4

C

CoP-3

D

CoP-5

Question 51: Palette 51/92

NEET 2012 MCQ

In an area where DDT had been used extensively, the population of birds declined significantly because :

A

Earthworms in the area got eradicated

B

Cobras were feeding exclusively on birds

C

Birds stopped laying eggs

D

Many of the birds eggs laid, did not hatch

Question 52: Palette 52/92

NEET 2012 MCQ

Which one of the following is a wrong statement?

A

Most of the forests have been lost in tropical areas

B

Greenhouse effect is a natural Phenomenon

C

Ozone in upper part of atmosphere is harmful to animals

D

Eutrophication is a natural phenomenon in freshwater bodies

Question 53: Palette 53/92

NEET 2012 MCQ

Measuring biochemical oxygen demand (BOD) is a method used for

A

Working out the efficiency of oil driven automobile engines

B

Estimating the amount of organic matter in sewage water

C

Measuring the activity of Saccharomyces cerevisae in producing curd on a commercial scale

D

Working out the efficiency of R.B.Cs. about their capacity to carry oxygen

Question 54: Palette 54/92

NEET 2011 MCQ

''Good ozone'' is found in the :

A

Troposphere

B

Ionosphere

C

Stratosphere

D

Mesosphere

Question 55: Palette 55/92

NEET 2011 MCQ

Which one of the following is correct expanded forms of the following acronyms ?

A

IPCC = International Panel for Climate Change

B

EPA = Environmental Pollution Agency

C

UNEP = United Nations Environmental policy

D

IUCN = International Union for Conservation of Nature and Natural Resources

Question 56: Palette 56/92

NEET 2011 MCQ

Which one of the following pairs of gases are the major cause of "Green house effect"?

A

CFCs and SO₂

B

CO₂ and CO

C

CO₂ and N₂O

D

CO₂ and O₃

Question 57: Palette 57/92

NEET 2011 MCQ

Eutrophication is often seen in :

A

Ocean

B

Mountains

C

Deserts

D

Fresh water lakes

Question 58: Palette 58/92

NEET 2011 MCQ

Which one of the following statements is wrong in case of Bhopal tragedy ?

A

Thousands of human beings died

B

It took place in the night of December 2/3, 1984

C

Radioactive fall out engulfed Bhopal

D

Methyl Isocyanate gas leakage took place

Question 59: Palette 59/92

NEET 2010 MCQ

When domestic sewage mixes with river water -

A

The river water is still suitable for drinking as impurities are only about 0.1%

B

Small animals like rats will die after drinking river water

C

The increased microbial activity releases micro-nutrients such as iron

D

The increased microbial activity uses up dissolved oxygen

Question 60: Palette 60/92

NEET 2010 MCQ

The two gases making highest relative contribution to the green house gases are –

A

CFC₅ and N₂O

B

CO₂ and N₂O

C

CO₂ and CH₄

D

CH₄ and N₂O

Question 61: Palette 61/92

NEET 2010 MCQ

dB is a standard abbreviation used of the quantitative expression of –

A

the dominant Bacillus in a culture

B

the density of bacteria in a medium

C

a certain pesticide

D

a particular pollutant

Question 62: Palette 62/92

NEET 2010 MCQ

A renewable exhaustible natural resource is –

A

Forest

B

Minerals

C

Coal

D

Petroleum

Question 63: Palette 63/92

NEET 2009 MCQ

Global agreement in specific control strategies to reduce the release of ozone depleting substances, was adopted by :

A

The Montreal Protocol

B

The Kyoto Protocol

C

The Vienna Convention

D

Rio de Janeiro Conference

Question 64: Palette 64/92

NEET 2009 MCQ

Montreal protocol aims at :

A

Control of water pollution

B

Biodiversity conservation

C

Control of CO₂ emission

D

Reduction of ozone depleting substances

Question 65: Palette 65/92

NEET 2009 MCQ

Biochemical Oxygen Demand (BOD) in a river water :

A

Gives a measure of Salmonella in the water

B

has no relationship with concentration of oxygen in the water

C

Increases when sewage gets mixed with river water

D

Remains unchanged when algal bloom occurs

Question 66: Palette 66/92

NEET 2009 MCQ

Chipko movement was launched for the protection of -

A

Forests

B

Livestock

C

Wet lands

D

Grasslands

Question 67: Palette 67/92

NEET 2009 MCQ

DDT residues are rapidly passed through food chain causing biomagnification because DDT is :

A

Moderately toxic

B

Water soluble

C

Non-toxic to aquatic animals

D

Lipo soluble

Question 68: Palette 68/92

NEET 2009 MCQ

Step taken by the Government of India to control air pollution include :

A

Permission to use only pure diesel with a maximum of 500 ppm sulphur as fuel for vehicles

B

Compulsary PUC (Pollution Under Control) certification of petrol driven vehicles which tests for carbon monoxide and hydrocarbons

C

Use of non-polluting Compressed Natural Gas (CNG) only as fuel by all buses and trucks

D

Compulsory mixing of 20% ethyl alcohol with petrol and 20% biodiesel with diesel

Question 69: Palette 69/92

NEET 2008 MCQ

According to Central Pollution Control Board (CPCB), which particulate size in diameter (in micrometers) of the air pollutants is responsible for greatest harm to human health?

A

2.5 or less

B

1.5 or less

C

1.0 or less

D

5.2-2.5

Question 70: Palette 70/92

NEET 2008 MCQ

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 ?

A

CFCs 14%, Methane 20%

B

CO₂ 40%, CFCs 30%

C

N₂O 6%, CO₂ 86%

D

Methane 20%, N₂O 18%

Question 71: Palette 71/92

NEET 2008 MCQ

A lake near a village suffered heavy mortality of fishes within a few days. Consider the following reasons for this?
(i) Lots of urea and phosphate fertilizer were used in the crops in the vicinity
(ii) the area was sprayed with DDT by an aircraft
(iii) The lake water turned green and stinky
(iv) Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis
Which two of the above were the main causes of fish mortality in the lake?

A

(i), (ii)

B

(iii), (iv)

C

(i), (iii)

D

(ii), (iii)

Question 72: Palette 72/92

NEET 2007 MCQ

Which one of the following is not a bioindicator of water pollution ?

A

Blood-worms

B

Stone flies

C

Sewage fungus

D

Sludge-worms

Question 73: Palette 73/92

NEET 2007 MCQ

Which one of the following statements is correct ?

A

Cyanobacteria such as Anabaena and nostoc are important mobilizers of phosphates and potassium for plant nutrition in soil

B

Both Azotobacter and Rhizobium fix atmospheric nitrogen in root nodules of plants

C

At present it is not possible to grow maize without chemical fertilizers

D

Extensive use of chemical fertilizers may lead to eutrophication of nearby water bodies

Question 74: Palette 74/92

NEET 2007 MCQ

In a coal fired power plant electrostatic precipitators are installed to control emission of:-

A

SPM

B

SO₂

C

CO

D

NOx

Question 75: Palette 75/92

NEET 2007 MCQ

In which one of the following the BOD (Biochemical Oxygen Demand) of sewage (S), distillery effluent (DE), paper mill effluent (PE) and sugar mill effluent (SE) have been arranged in ascending order ?

A

SE < PE < S < DE

B

SE < S < PE < DE

C

PE < S < SE < DE

D

S < DE < PE < SE

Question 76: Palette 76/92

NEET 2006 MCQ

Photochemical smog pollution does not contain-

A

Nitrogen dioxide

B

PAN (peroxy acyl nitrate)

C

Ozone

D

Carbon dioxide

Question 77: Palette 77/92

NEET 2006 MCQ

Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste waters into natural surface waters, is -

A

< 30 ppm

B

< 3.0 ppm

C

< 100 ppm

D

<10 ppm

Question 78: Palette 78/92

NEET 2006 MCQ

Montreal Protocol which calls for appropriate action to protect the ozone layer from human activities was passed in the year-

A

1988

B

1986

C

1985

D

1987

Question 79: Palette 79/92

NEET 2005 MCQ

Which one of the following pairs is mismatched ?

A

Fossil fuel burning – release of CO₂

B

Nuclear power – radioactive wastes

C

Biomass burning – release of CO₂

D

Solar energy – green house effect

Question 80: Palette 80/92

NEET 2005 MCQ

Identify the correctly matched pair -

A

Basal Convention – Biodiversity Conservation

B

Kyoto protocol – Climatic change

C

Ramsar Convention – Ground water pollution

D

Montreal Protocol - Global warming

Question 81: Palette 81/92

NEET 2005 MCQ

Which of the following is not used for disinfection of drinking water ?

A

Chloramine

B

Ozone

C

Chlorine

D

Phenyl

Question 82: Palette 82/92

NEET 2005 MCQ

Prolonged liberal irrigation of agricultural fields is likely to create the problem of -

A

salinity

B

Acidity

C

Aridity

D

Metal toxicity

Question 83: Palette 83/92

NEET 2004 MCQ

Lead concentration in blood is considered alarming if it is -

A

4-6 µg/100 ml

B

30 µg/100 ml

C

20 µg/100 ml

D

10 µg/100 ml

Question 84: Palette 84/92

NEET 2004 MCQ

In 1984, the Bhopal gas tragedy took place because methyl isocyanate :-

A

Reacted with DDT

B

Reacted with water

C

Reacted with ammonia

D

Reacted with CO₂

Question 85: Palette 85/92

NEET 2004 MCQ

Common indicator organism of water pollution is :-

A

Escherichia coli

B

Lemna pancicostata

C

Entamoeba histolytica

D

Eichhornia crassipes

Question 86: Palette 86/92

NEET 2003 MCQ

Fluoride pollutions mainly affects : -

A

Heart

B

Kidney

C

Brain

D

Teeth

Question 87: Palette 87/92

NEET 2003 MCQ

Escherichia coli is used as an indicator organism to determine pollution of water with ;-

A

Faecal matter

B

Pollen of aquatic plants

C

Heavy metals

D

Industrial effluents

Question 88: Palette 88/92

NEET 2002 MCQ

Maximum green house gas released by which country :

A

France

B

Britain

C

India

D

U.S.A.

Question 89: Palette 89/92

NEET 2002 MCQ

Which of the following is absent in polluted water ?

A

Larva of stone fly

B

Hydrilla

C

Blue green algae

D

Water hyacinth

Question 90: Palette 90/92

NEET 2001 MCQ

What is the intensity of sound in normal conversation ?

A

30 – 60 dB

B

10 – 20 dB

C

120 – 150 dB

D

70 - 90 dB

Question 91: Palette 91/92

NEET 2001 MCQ

What is B.O.D ?

A

The total amount of O₂ present in water

B

The amount of O₂ utilised by organisms in water

C

The amount of O₂ utilized by micro organisms for decomposition

D

All of the above

Question 92: Palette 92/92

NEET 2000 MCQ

Which is the cause of damage to relative biological effectiveness ?

A

Low temperature

B

High temperature

C

Radiation

D

Pollution