Ecosystem Test 4

Total Questions:50 Total Time: 75 Min

Remaining:

 

Questions 1 of 50

Question:In ecosystem lithosphere is concerned with

Answers Choices:

Gases

Minerals

Water

All the above

Questions 2 of 50

Question:Which of the following is producer of plant kingdom

Answers Choices:

Melia

Ficus

Ziziphus

All the above

Questions 3 of 50

Question:The net primary productivity of an ecosystem is

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Total weight of green plants - respiratory losses

Total weight of green plants + respiratory losses

Respiratory losses alone

None of the above

Questions 4 of 50

Question:Whale is

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Primary producer

Carnivorous secondary consumer

A decomposer

Herbivorous

Questions 5 of 50

Question:A natural ecosystem

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Depends on man

Depends on plants

Depends on animals

Is auto-operated

Questions 6 of 50

Question:Which of the following in an ecosystem exhibits one-way flow rather than cyclic flow

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Potassium

Carbon

Free energy

Nitrogen

Questions 7 of 50

Question:In an ecosystem, there are more prey than predators. This relationship is called

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Food webs

Predator-prey relationship

Pyramid of number

Succession

Questions 8 of 50

Question:Which is an example of true pyramid in an ecosystem

Answers Choices:

Pyramid of a biomass

Pyramid of number

Pyramid of energy

None of the above

Questions 9 of 50

Question:Idea of productivity of an ecosystem can be had from

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Pyramid of number

Pyramid of biomass

Height of the plant

Development of foliage

Questions 10 of 50

Question:The pyramid of biomass and the pyramid of number represent

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The rate of energy flow

The rate of food production

Standing crop

Relationship among organisms

Questions 11 of 50

Question:In an ecosystem energy flows in

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One direction

Two direction

Four direction

All directions

Questions 12 of 50

Question:The planktonic forms are

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Autotrophs

Heterotrophs

Chemotrophs

Insectivorous types

Questions 13 of 50

Question:Which one of the following contains very low concentrations of dissolved inorganic nutrients for algal growth

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Oligotrophic lake

Eutrophic lake

Mesotrophic lake

Both eutrophic and mesotrophic lakes

Questions 14 of 50

Question:Standing state of the ecosystem is

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Living and non-living components

Only living components

Total weight of non-living components

None of the above

Questions 15 of 50

Question:An ecosystem resist change because it is in a state of

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Imbalance

Homeostasis

Shortage of components

Deficiency of light

Questions 16 of 50

Question:In an ecosystem, the population of

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Primary producers are more than that of primary consumers

Secondary consumers are largest because they are powerful

Primary consumers out number primary producers

Primary consumers are least dependent upon primary producers

Questions 17 of 50

Question:On the global basis the maximum productivity is shown by

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Aquatic ecosystem

Grasslands

Forests

Deserts

Questions 18 of 50

Question:Which of the following acts as "nature's scavengers"

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Man

Animals

Insects

Micro-organisms

Questions 19 of 50

Question:The total energy fixed by a gram plant (Cicer arietinum) in an ecosystem on the whole is called

Answers Choices:

Primary production

Gross production

Secondary production

None of the above

Questions 20 of 50

Question:Which of the following is correct sequence in food chain

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Fallen leaves \( \to \)bacteria \( \to \) insect larvae \( \to \) birds

Phytoplankton \( \to \) zooplankton \( \to \) fish

Grasses \( \to \) fox \( \to \) rabbit

Grasses \( \to \) chameleon \( \to \) insects \( \to \) birds

Questions 21 of 50

Question:The transfer of energy from organism to organism in a natural community establishes

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Food chains

Biological control

Natural barriers

All the above

Questions 22 of 50

Question:With regard to ecological food chain, man is a

Answers Choices:

Producer

Consumer

Both producer and consumer

Producer and decomposer

Questions 23 of 50

Question:The pyramid of number is based on

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Unit per area

Food per individual

Individuals in trophic level

None of these

Questions 24 of 50

Question:In a pyramid of numbers, in a grassland ecosystem, the largest population is that of

Answers Choices:

Producers

Tertiary consumers

Secondary consumers

Primary consumers

Herbivores

Questions 25 of 50

Question:The phytoplankton in the ponds act as

Answers Choices:

Producers

Decomposers

Consumers

Organic compounds

Questions 26 of 50

Question:The character of an ecosystem is determined by the environmental factor which is shortest supply. This is the

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Law of minimum

Law of diminishing returns

Law of limiting factors

Law of supply and demand

Questions 27 of 50

Question:In a biotic community, primary consumers are

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Omnivores

Carnivores

Detritivores

Herbivores

Questions 28 of 50

Question:Which of the following does not effect the forest ecosystem

Answers Choices:

Deforestation

Soil erosion

Climatic variation

None of these

Questions 29 of 50

Question:The pyramid of energy in a forest ecosystem is

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Always upright

Always inverted

Both upright and inverted

None of the above

Questions 30 of 50

Question:In an ecosystem, there is flow of energy at different trophic levels. This is as follows :

Answers Choices:

Primary consumers — Tertiary consumers — Secondary consumers — Decomposers — Producers

Producers — Primary consumers — Secondary consumers — Tertiary consumers — Decomposers

Producers — Decomposers — Primary consumers — Tertiary consumers — Secondary consumers

Producers — Primary consumers — Tertiary consumers — Secondary consumers — Decomposers

Questions 31 of 50

Question:The food chain in which microbes split energy rich compounds of the producer community is

Answers Choices:

Parasitic food chain

Detritus food chain

Predators food chain

Producer food chain

Questions 32 of 50

Question:In an ecosystem bacteria are considered as

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Microconsumers

Macroconsumers

Primary consumers

Secondary consumers

Questions 33 of 50

Question:A lake ecosystem is

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Artificial

Abiotic

Natural

Hydrological

Questions 34 of 50

Question:Ecological pyramids are of

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Two types

Three types

Four types

Five types

Questions 35 of 50

Question:The green plants are removed from an aquarium

Answers Choices:

The fishes will not survive

Fishes will increase in size

Fishes will decrease in size

None of the above

Questions 36 of 50

Question:In an ecosystem

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Cycling of energy and nutrients is a coupled process

Cycling of energy is an independent process

Movement of energy is unidirectional

Macro and micronutrients cycle at the same pace

Questions 37 of 50

Question:Ecosystem is defined as

Answers Choices:

Relation between plants and animals

Relation between biotic and physical components

Relation between producers and decomposers

None of these

Questions 38 of 50

Question:Decomposers are

Answers Choices:

Autotrophs

Heterotrophs

Autoheterotrophs

Organotrophs

Questions 39 of 50

Question:Green plants are

Answers Choices:

Autotrophs

Heterotrophs

Chemotrophs

None of these

Questions 40 of 50

Question:Pyramid of energy is

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Upright

Inverted

Oblique

None of these

Questions 41 of 50

Question:The flora and fauna in lakes or ponds are

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Lentic biota

Lotic biota

Abiotic biota

Field layer

Questions 42 of 50

Question:During food chain the maximum energy is stored in

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Producers

Decomposers

Herbivores

Carnivores

Questions 43 of 50

Question:A plant being eaten by a herbivorous which in turn is eaten by a carnivorous makes

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Food chain

Food web

Omnivorous

Interdependent

Questions 44 of 50

Question:When peacock eats snakes which eat insects thriving on green plants, the peacock is [CPMT 2002; RPMT 2005]

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A primary consumer

A primary decomposer

Final decomposer

The apex of food pyramid

Questions 45 of 50

Question:A pond is a

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Biome

Natural ecosystem

Artificial ecosystem

Community of plants and animals

Questions 46 of 50

Question:Source of energy in an ecosystem is

Answers Choices:

Sun

ATP

Sugar made by plants

Green plant

Questions 47 of 50

Question:Which of the following organism form the decomposers

Answers Choices:

Pteris

Bacteria

Saprophytic fungi

Both (1) and (2)

Questions 48 of 50

Question:Which of the following supports a dense population of plankton and littoral vegetation

Answers Choices:

Oligotrophic

Eutrophic

Lithotrophic

Agroecotrophic

Questions 49 of 50

Question:A man-made ecosystem is

Answers Choices:

Less in diversity

More in diversity

Man does not make ecosystem

More stable than natural ecosystem

Questions 50 of 50

Question:Given below is one of the types of ecological pyramids This type represents

Answers Choices:

Pyramid of numbers in a grassland

Pyramid of biomass in a fallow land

Pyramid of biomass in a lake

Energy pyramid in a spring