Ecosystem Test 2

Total Questions:50 Total Time: 75 Min

Remaining:

 

Questions 1 of 50

Question:Which of the cycle is concerned with energy flow in the ecosystem

Answers Choices:

Food cycle

\({{\rm{O}}_{\rm{2}}}\)cycle

\({\rm{C}}{{\rm{l}}_{\rm{2}}}\)cycle

All the above

Questions 2 of 50

Question:In a given ecosystem number of individuals in species remain more or less constant over a period of time. The constancy of number is maintained by

Answers Choices:

Parasite

Predators

Man

Available food

Questions 3 of 50

Question:Which group of living organisms given below is a link in food chain between green plants and hawk

Answers Choices:

Grasshopper, frog and snake

Grasshopper, rat and snake

Millipedes, centipedes and sparrow

Earthworm, hen and rat

Questions 4 of 50

Question:The bacteria which attack dead animals are

Answers Choices:

First link of the food chain and are known as primary producers

Second link of the food chain and are herbivorous

Third link of the food chain and are tertiary consumers

The end of food chain and are decomposers

Questions 5 of 50

Question:In lake ecosystem the population rise or its explosion is termed

Answers Choices:

Tide

Bloom

Plankton

Nekton

Questions 6 of 50

Question:Micro-consumers are

Answers Choices:

Primary consumers

Secondary consumers

Tertiary consumers

Decomposers

Questions 7 of 50

Question:The trophic level of Cuscuta, Orobanche and Albugo is

Answers Choices:

Decomposer

Primary producer

Primary consumer

Secondary consumer

Questions 8 of 50

Question:The trophic level of mushroom and Monotropa is

Answers Choices:

Producer

Primary consumer

Secondary consumer

Decomposer

Questions 9 of 50

Question:Which of the following is not used for construction of ecological pyramids

Answers Choices:

Rate of energy flow

Fresh weight

Dry weight

Number of individuals

Questions 10 of 50

Question:Which of the following has the greatest amount of energy

Answers Choices:

Insectivores

Carnivores

Herbivores

Autotrophs

Questions 11 of 50

Question:Herbivores are called

Answers Choices:

Primary consumers

Secondary producers

Key industry animals

All the above

Questions 12 of 50

Question:Osmotrophs are also called as

Answers Choices:

Producers

Consumers

Autotrophs

Decomposers

Questions 13 of 50

Question:A wolf has just eaten a lamb when tiger saw the wolf attacked it and consumed it. The tiger is in ecological terms

Answers Choices:

A producer

A primary consumer

A secondary consumer

A tertiary consumer

Questions 14 of 50

Question:Green plants constitute

Answers Choices:

First trophic level

Second trophic level

Third trophic level

Complete food chain

Questions 15 of 50

Question:An ecosystem is a complex interacting system of

Answers Choices:

Individual

Population

Communities and their physical environment

Communities and their soil conditions

Questions 16 of 50

Question:Eutrophic lakes means

Answers Choices:

Lake poor in nutrients

Lake rich in nutrients

Lake poor in flora and fauna

Lake lacking in water

Questions 17 of 50

Question:In an ecosystem which of the following are important components

Answers Choices:

Energy flow and food chain

Mineral recycling and energy flow

Food chain and decomposers

All the above

Questions 18 of 50

Question:Among the following, what happens in abiotic components of an ecosystem

Answers Choices:

Flow of energy

Cycling of materials

Consumer

Flow of energy and cycling of material

Questions 19 of 50

Question:The maximum biological magnification of DDT through food web is seen in

Answers Choices:

Algae

Bacteria

Higher plants

Man

Questions 20 of 50

Question:The pyramid that cannot be inverted in a stable ecosystem, is pyramid of

Answers Choices:

Number

Energy

Biomass

All the above

Questions 21 of 50

Question:In a food chain herbivores are

Answers Choices:

Primary producers

Primary consumers

Secondary consumers

Decomposers

Questions 22 of 50

Question:In a food chain of grassland ecosystem, the top consumers are

Answers Choices:

Carnivores

Herbivores

Either carnivores or herbivores

Bacteria

Questions 23 of 50

Question:Biological equilibrium is an equilibrium among the

Answers Choices:

Producers

Producers and consumers

Decomposers and producers

Producers, consumers and decomposers

Questions 24 of 50

Question:In a tree ecosystem, the pyramid of number is

Answers Choices:

Upright

Inverted

Both of the above

None of the above

Questions 25 of 50

Question:In forest ecosystem, pyramid of number is

Answers Choices:

Upright

Inverted

Any of the two

None of the above

Questions 26 of 50

Question:Carnivores are

Answers Choices:

Usually primary consumers

Usually secondary consumers

Usually second

ary or tertiary consumers

Usually decomposers rather than consumers

Questions 27 of 50

Question:The trophic level of lion in a forest ecosystem is

Answers Choices:

\({T_1}\)

\({T_2}\)

\({T_3}\)

\({T_4}\)

Questions 28 of 50

Question:What energy percentage can be captured by the organisms of next trophic level

Answers Choices:

20%

30%

90%

10%

Questions 29 of 50

Question:In a food chain, which of the following produces in the largest amount

Answers Choices:

Producers

Decomposers

Tertiary consumers

Primary consumers

Questions 30 of 50

Question:If forest area is reduced to half, which one of the following will be a long term effect

Answers Choices:

The natives (tribals) of that area will die on account of hunger

Catties of that area will die due to scarcity of fodder

The diversity in germplasm will effect the crop breeding

It will be converted into large desert

Questions 31 of 50

Question:The first link in any food chain is always a green plant because

Answers Choices:

They are widely distributed

They are firmly fixed to the soil

They alone have a capacity to fix atmospheric \({\rm{C}}{O_{\rm{2}}}\) in the presence of sunlight

All of the above

Questions 32 of 50

Question:Food levels in an ecosystem are called

Answers Choices:

Trophic levels

Consumer levels

Producer levels

Herbivore levels

Questions 33 of 50

Question:Ecosystem may be defined as

Answers Choices:

Group of plants which act as the energy suppliers

Group of organisms which form population

Functional unit for ecological studies

None of these

Questions 34 of 50

Question:Which of the following habitats is most unsuitable for primary productivity

Answers Choices:

Meadow

Forested river bank

Cave

Pond

Questions 35 of 50

Question:In an ecosystem in abiotic components which of the following occur

Answers Choices:

Flow of energy

Cycling of materials

Consumers

Flow of energy and cycling of materials

Questions 36 of 50

Question:The transfer or energy from organisms to organisms in a natural community establishes

Answers Choices:

Food chains

Biological control

Natural barriers

All the above

Questions 37 of 50

Question:The Great Barrier Reef along the east coast of Australia can be categorised as

Answers Choices:

Population

Community

Ecosystem

Biome

Questions 38 of 50

Question:The dominant second trophic level, in a lake ecosystem, is

Answers Choices:

Benthos

Plankton

Zooplankton

Phytoplankton

Questions 39 of 50

Question:A rat feeding upon potato tuber is

Answers Choices:

Producer

Carnivore

Decomposer

Primary consumer

Questions 40 of 50

Question:Tip of ecological pyramid is occupied by

Answers Choices:

Herbivores

Carnivores

Producers

Decomposers

Questions 41 of 50

Question:When the number of organisms at successive levels are plotted, they assume the shape of a pyramid. This is called the pyramid of

Answers Choices:

Energy

Number

Biomass

Both (1) and (2)

Questions 42 of 50

Question:The two vegetation of ecosystem are separated by

Answers Choices:

Ecotone

Ecoline

Ecosystem

Ecesis

Questions 43 of 50

Question:Energy enters into the ecosystem through

Answers Choices:

Herbivores

Carnivores

Producers

Decomposers

Questions 44 of 50

Question:Which of the following is an artificial ecosystem

Answers Choices:

Rice-field

Forest

Grassland

Lake

Questions 45 of 50

Question:A food chain starts with

Answers Choices:

Nitrogen fixing organisms

Photosynthesis

Respiration

Decomposers

Questions 46 of 50

Question:If bamboo plant is growing in a far forest then what will be its trophic level

Answers Choices:

First

Second

Third

Fourth

Questions 47 of 50

Question:In forest ecosystem, fungi is grouped as

Answers Choices:

Producer

Consumer

Secondary consumer

Decomposer

Questions 48 of 50

Question:Which ecosystem shows maximum genetic diversity

Answers Choices:

Coniferous forests

Tropical rain forests

Subtropical forests

Temperate forests

Questions 49 of 50

Question:Bacteria and fungi in a forest ecosystem are generally

Answers Choices:

Producers

Decomposers

Primary consumers

Secondary consumers

Tertiary consumers

Questions 50 of 50

Question:Area where two ecosystems overlap each other

Answers Choices:

Niche

Ecotype

Edge line

Ecotone

Corridor