Biology/Biology MCQS[NEET-2021 to 2022]-Ecology-II Sample Test,Sample questions

Question:
"Complete competitors cannot coexist" is true for

1.Primary succession

2.Secondary succession

3.Competitive exclusion

4.Character displacement


Question:
A renewable exhaustible natural resource is

1.Petroleum

2.Coal

3.Forests

4.Minerals


Question:
An ecosystem which can be easily damaged but can recover after some time if damaging effect stops will be having

1.High stability and high resilience

2.Low stability and low resilience

3.High stability and low resilience

4.Low stability and high resilience


Question:
Bell-shaped polygonal pyramid indicates

1.Low percentage of young individuals

2.Moderate percentage of young individuals

3.High percentage of young individuals

4.Low percentage of old individuals


Question:
Community is

1.Species structure and diversity index of an area

2.Biomass

3.Autotrophic and heterotrophic components

4.All of these


Question:
Competition is severe in a population that has a distribution which is

1.Uniform

2.Random

3.Non-random

4.Irregular


Question:
Identify the possible link "A" in the following food chain: Plant → insect → frog → "A" → Eagle

1.Parrot

2.Rabbit

3.Cobra

4.Wolf


Question:
In a population, if the rate of addition of new members is higher than the rate of individuals lost, it shows

1.Exponential growth

2.Declined growth

3.Zero population growth

4.none of these


Question:
In an aquatic ecosystem, the trophic level equivalent to cows in grasslands is

1.Zooplankton

2.Phytoplankton

3.Benthos

4.Nekton


Question:
In an ecosystem Biotic factors affect the survival of an organism in that ecosystem. They include

1.competition for food and water

2.competition for shelter

3.co-operation to help find food

4.All of the above


Question:
In ecological succession from pioneer to climax community, the biomass shell

1.No relation

2.Increase and then decrease

3.Decrease

4.Increase continuously


Question:
Individuals of a species which occur in a particular area constitute

1.Fauna

2.Population

3.Flora

4.Flora and Fauna


Question:
Information about birth rate, death rate, sex ratio, age distribution etc. of a population is obtained from

1.Mortality rate

2.Life table

3.Natality table

4.Both (A) and (C)


Question:
Insectivorous plants are adopted to soils

1.Deficient in nitrogenous compounds

2.Deficient in water

3.Rich in water

4.Deficient in trace elements


Question:
Carbon dioxide is called green-house gas because it is

1.Transparent to sunlight but traps heat

2.Transparent to heat but traps sunlight

3.Used in green-house to increase plant growth

4.Transparent to both sunlight and heat


Question:
Large Woody Vines are more commonly found in

1.Alpine forests

2.Temperate forests

3.Mangroves

4.Tropical rainforests


Question:
Lead is one of the most serious environmental pollutants which affects

1.Water

2.Soil

3.Air

4.Noise


Question:
lf there was no CO2 in the atmosphere, the earth temperature would be

1.Less than the present

2.Same as present

3.Higher than the present

4.Dependent on O2 content of air


Question:
Lichens indicate pollution by

1.Ozone

2.SO2

3.NO3

4.CO


Question:
Major aerosol pollutant present in the jet plane emission is

1.Carbon monoxide

2.Carbon tetrachloride

3.Chlorofluorocarbon

4.Sulphur dioxide


Question:
Maximum deposition of DDT will occur in

1.Phytoplankton

2.Crab

3.Eel

4.Sea gull


Question:
Maximum threat to the world is from

1.Global warming

2.Ozone hole

3.Water pollution

4.Soil erosion


Question:
Minamata disease is due to pollution of

1.Industrial waste mercury into fishing water

2.Oil spill in water

3.Organic waste into drinking water

4.Arsenic into the atmosphere


Question:
Montreal Protocol aims at

1.Control of CO2 emission

2.Reduction of ozone depleting substances

3.Biodiversity conservation

4.Control of water pollution


Question:
Most abundant water pollutant is

1.Industrial wastes

2.Pesticides

3.Detergents

4.Ammonia


Question:
Most harmful environmental pollutants are

1.Natural nutrients in excess

2.Human organic wastes

3.Nonbiodegradable chemicals

4.Waste animal feed


Question:
Organisms that can tolerate and thrive in a wide range of temperatures are called

1.Eukaryotic organisms

2.Stenothermal

3.Eurythermal

4.None of these


Question:
Pheromones, the chemical messengers produced by certain exocrine glands of skin, affect

1.Skin color

2.Breast

3.Genitalia

4.Mutual behaviour of members of a species


Question:
Plant succession occurring in a sandy area is

1.Xerosere

2.Halosere

3.Psammosere

4.Hydrosere


Question:
The age of pyramid with broad base indicates

1.High percentage of old individuals

2.Low percentage of young individuals

3.High percentage of young individuals

4.Low percentage of old individuals


Question:
The atmosphere of big metropolitan cities is polluted most by

1.Automobile exhausts

2.Radio-active fall out

3.Household waste

4.Pesticides residue


Question:
The final stable community in ecological succession is

1.Climax

2.Sere

3.Pioneers

4.Carnivores


Question:
The maximum amount of water that a soil can hold, by capillary action is called

1.Wilting point

2.Water potential

3.Osmotic potential

4.Field capacity


Question:
The role of an organism in the ecological system is known as

1.Niche

2.Habitat

3.Herbivory

4.Interaction


Question:
The slow rate of decomposition of fallen logs in nature is due to their:

1.Poor nitrogen content

2.Low moisture content

3.Anaerobic environment around them

4.Low cellulose content


Question:
The type of ecosystem with the highest mean plant productivity is

1.Tropical rain forest

2.Temperate grassland

3.Desert

4.Tundra


Question:
The ultraviolet radiations in the stratosphere are absorbed by

1.SO2

2.Oxygen

3.Ozone

4.Argon


Question:
The upright pyramid of number is absent in

1.Graasland

2.Pond

3.Lake

4.Forest


Question:
Trichoderma harzianum has proved a useful microorganism for:

1.Reclamation of wastelands

2.Bioremediation of contaminated soils

3.Biological control of soil-borne plant pathogens

4.Gene transfer in higher plants


Question:
Trophic levels in ecosystem is formed by :

1.only herbivores

2.Only bacteria

3.only plants

4.Organisms linked in food chain


Question:
Ultra-violet light causes

1.Photodynamic action

2.Sticky metaphases

3.Formation of pyrimidines

4.Destruction of hydrogen bonds between complementary DNA strands


Question:
Which factor of ecosystem includes plants, animals and microorganisms?

1.Biotic factors

2.Direct factors

3.Indirect factors

4.Abiotic factors


Question:
Which of the environmental pollutions can cause birth defects?

1.Smog

2.SO2

3.CO

4.Radioactivity


Question:
Which of the following pollutants is discharged by jet planes?

1.Photo-chemical oxidants

2.Frog

3.Smog

4.Aerosols


Question:
Which of the followings take part in symbiosis of lichen?

1.Fungus-Fungus

2.Alga-Alga

3.Alga-Fungus

4.Fungus-Gymnosperm


Question:
Which one of the following ecosystem types has the highest annual net primary productivity?

1.Tropical deciduous forest

2.Tropical rain forest

3.Temperate deciduous forest

4.Temperate evergreen forest


Question:
Which one of the following is not a bioindicator of water pollution

1.Blood-worms

2.Sludge-worms

3.Sewage fungus

4.Stone flies


Question:
Which one of the following is not a functional unit of an ecosystem?

1.Productivity

2.Stratification

3.Energy flow

4.Decomposition


Question:
Which one of the following is not a gaseous biogeochemical cycle in ecosystem?

1.Nitrogen cycle

2.Carbon cycle

3.Sulphur cycle

4.Phosphorus cycle


Question:
Which one of the following is the correct percentage of the two (out of the total of 4) green house gases that contribute to the total global warming?

1.CO2 40%,CFCs 30%

2.CFCs 14%, Methane 20%

3.Methane 20%, N2O 18%

4.N2O 6%, CO2 86%


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