Ecosystem Test 1

Total Questions:50 Total Time: 75 Min

Remaining:

 

Questions 1 of 50

Question:Primary producer of an ecosystem is

Answers Choices:

Herbivores

Carnivores

Both (1) and (2)

Green plants

Questions 2 of 50

Question:Which of the following are consumers of second order

Answers Choices:

Herbivores

Carnivores

Top carnivores

None of the above

Questions 3 of 50

Question:When food energy passes from herbivores to carnivores

Answers Choices:

Some energy is increased

Some energy is decreased

Remain unchanged

Not relevant

Questions 4 of 50

Question:What is studied under the "microcosm"

Answers Choices:

Ecosystem

Livings

Non-livings

None of the above

Questions 5 of 50

Question:Dynamic aspect of an ecosystem is

Answers Choices:

Producer and energy flow

Producer and mineral cycles

Consumer and mineral cycles

Energy flow and mineral cycles

Questions 6 of 50

Question:Y-shaped energy flow model was given by

Answers Choices:

H.T. Odum

E.P. Odum

Tensley

Both (1) and (2)

Questions 7 of 50

Question:Food chain is a series of population which starts with producers. Its is concerned with

Answers Choices:

Biotic components only

Energy flow and transfer of nutrients

Both (1) and (2)

Biotic and decomposers

Questions 8 of 50

Question:Plankton, nekton and benthos are not the components of

Answers Choices:

River ecosystem

Oceanic ecosystem

Savanna ecosystem

Lake ecosystem

Questions 9 of 50

Question:The pyramid of energy is the best representation of an ecosystem because it indicates

Answers Choices:

Relation of all plants and animals

Total energy present in an ecosystem

The rate of food flow through the food chain

None of these

Questions 10 of 50

Question:Under what condition, the upright pyramid of biomass becomes inverted

Answers Choices:

Grassland ecosystem

Terrestrial ecosyslem

Pond ecosystem

Tree ecosystem

Questions 11 of 50

Question:The storage of organic matter not used by heterotrophs is termed as

Answers Choices:

Gross primary production

Net secondary production

Net production

Secondary production

Questions 12 of 50

Question:In an ecosystem, the largest population is of

Answers Choices:

Producers

Consumers

Decomposers

Omnivores

Questions 13 of 50

Question:Association of two organism in which one is neither benefited nor harmed and have no physiological exchange between them, is known as

Answers Choices:

Commensalism

Mutualism

Amensalism

Competition

Questions 14 of 50

Question:In food web hyenas and vultures are

Answers Choices:

Primary consumers

Predators

Scavengers

Decomposers

Questions 15 of 50

Question:If all the plants of the world die all the animals will also die due to shortage of

Answers Choices:

Cold air

Oxygen

Food

Timber

Questions 16 of 50

Question:Maximum solar energy may be trapped by

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Growing grasses

Planting trees

Growing algae in large water bodies

More cultivation of crop plants

Questions 17 of 50

Question:The pyramid of number in a grassland ecosystem is

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Always erect

Always inverted

Either erect or inverted

Irregular

Questions 18 of 50

Question:Cyberviatic is associated with

Answers Choices:

Flow of energy

Cycle of energy

Energy released

Study of energy

Questions 19 of 50

Question:Which is the correct sequence in the food chain in a grassland

Answers Choices:

Grass \( \to \) wolf \( \to \) deer \( \to \) buffalo

Bacteria \( \to \) grass \( \to \) rabbit \( \to \) wolf

Grass \( \to \) insect \( \to \) birds \( \to \) snakes

Grass \( \to \) snake \( \to \) insect \( \to \) deer

Questions 20 of 50

Question:Generally the food chain has how many trophic levels

Answers Choices:

One

Two

Three or Four

Three

Questions 21 of 50

Question:If phytoplankton are destroyed in the sea, then

Answers Choices:

Algae will get more space to grow

Primary consumers will grow luxuriantly

It will effect the food chain

No effect will be seen

Questions 22 of 50

Question:An ecosystem must have continuous external source of

Answers Choices:

Food

Minerals

Energy

All of the above

Questions 23 of 50

Question:The word "ecosystem" was first coined by

Answers Choices:

Weaver and Clements

A.G. Tansley

EP. Odum

By all the above

Questions 24 of 50

Question:Trophic levels are formed by

Answers Choices:

Organisms linked in food chain

Only plants

Only animals

Only carnivores

Questions 25 of 50

Question:Which must be preserved in an ecosystem, if the system is to be maintained

Answers Choices:

Producers and carnivores

Producers and decomposers

Carnivores and decomposers

Herbivores and carnivores

Questions 26 of 50

Question:Ecosystem has two components

Answers Choices:

Plants and animals

Weeds and trees

Biotic and abiotic

Frog and men

Questions 27 of 50

Question:Ecosystem creates

Answers Choices:

Food chain

Food web

Both the above

None of the above

Questions 28 of 50

Question:In lake ecosystem, pyramid biomass is

Answers Choices:

Upright

Inverted

Anything is possible

None is correct

Questions 29 of 50

Question:We refer to the following as the food chain

Answers Choices:

Large number of animals near a source of food

Transfer of food energy from the green plants through a series of consumer organisms

Large number of human beings forming a human chain near a source of food

None of these

Questions 30 of 50

Question:In a food chain, lion is a

Answers Choices:

Secondary consumer

Primary consumer

Tertiary consumer

Secondary producer

Questions 31 of 50

Question:In a pond ecosystem, benthos means

Answers Choices:

Primary consumers in the depth of a pond

Zooplankton on the water surface

Periphyton

Epineuston

Questions 32 of 50

Question:Transfer of energy from one trophic level to other trophic level is according to the second law of thermodynamics. The efficiency of energy transfer from herbivorous to carnivorous is

Answers Choices:

25%

50%

10%

5%

Questions 33 of 50

Question:To eat and be eaten relationship is called as

Answers Choices:

Food chain

Food web

Symbiosis

Phagocytosis

Questions 34 of 50

Question:Which of the following ecosystems would be most stable

Answers Choices:

Man made forest

Fresh water lake

Saline lake

Natural forest

Questions 35 of 50

Question:The living organisms of all ecosystems collectively constitute

Answers Choices:

Producers

Decomposers

Consumers

Biosphere

Questions 36 of 50

Question:The number of individuals of a species in a particular ecosystem at a given time remains constant due to

Answers Choices:

Man

Parasites

Predators

Available food

Questions 37 of 50

Question:In a terrestial ecosystem such as forest, maximum energy is in which trophic level

Answers Choices:

\({T_1}\)

\({T_2}\)

\({T_3}\)

\({T_4}\)

Questions 38 of 50

Question:The rate at which light energy is converted into chemical energy of organic molecules is the ecosystem's

Answers Choices:

Net primary productivity

Gross secondary productivity

Net secondary productivity

Gross primary productivity

Questions 39 of 50

Question:The relationship in an ecosystem can be depicted in

Answers Choices:

Pyramid of energy

Pyramid of biomass

Pyramid of numbers

All of these

Questions 40 of 50

Question:Biomass pyramid of forest is

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Inverted

Upright

Infinite

Finite

Questions 41 of 50

Question:Transition zone between two ecosystems or vegetational regions is termed

Answers Choices:

Ecocline

Ecotone

Ecad

Barrier

Questions 42 of 50

Question:The ecosystem consists of

Answers Choices:

Producers

Consumers

Decomposeis

All of these

Questions 43 of 50

Question:In a food chain, the total amount of living material is depicted by

Answers Choices:

Pyramid of biomass

Pyramid of energy

Pyramid of number

Trophic levels

Questions 44 of 50

Question:The biotic part of ecosystem includes

Answers Choices:

Producers

Consumers

Decomposers

All of these

Questions 45 of 50

Question:Maximum biomass and variable organism are found in

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River

Pond

Lake

Estuary

Questions 46 of 50

Question:In a food web. each successive trophic level has

Answers Choices:

Increased total energy

Less total energy content

More total energy content

Non estimated energy content

Questions 47 of 50

Question:Which of the following food chain may not be directly-dependent upon solar energy

Answers Choices:

Grazing

Detritus

Soaking

Depleting

Questions 48 of 50

Question:These belong to the catergory of primary consumers.....

Answers Choices:

Snakes and frogs

Water insects

Eagle and snakes

Insects and cattle

Questions 49 of 50

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

Answers Choices:

Low stability and low resilience

High stability and high resilience

Low stability and high resilience

High stability and low resilience

Questions 50 of 50

Question:Energy flow and energy transformations in living systems strictly conform to the

Answers Choices:

Law of limiting factors

Liebig's law of minimum

Laws of thermodynamics

Shelford's law of tolerance

Biogenetic law