NTA NEET Ecosystem Objective Questions,answers,solutions,pdfs,mcqs

Ecosystem Mock Exam-8

Question No:1

Ecosystem shows:

[A] Homeostasis
[B] Mineral cycling
[C] Energy flow [D] All of these



Question No:2

Diagrammatic representation of different trophic levels of an ecosystem presents:

[A] Energy flow
[B] Mineral cycling
[C] Food chain and food web [D] Ecological pyramids



Question No:3

A plant eaten by a herbivorous animal which in turn is eaten by a carnivorous animal forms a:

[A] Food web
[B] Food chain
[C] Food pyramid [D] Food cycle



Question No:4

Which of the following statements is correct?

[A] Producers produce energy.
[B] Consumers consume energy,
[C] Decomposers decompose energy. [D] Producers transform energy.



Question No:5

Food chain operating on decaying cow dung or organic remains is referred to as:

[A] Secondary succession
[B] Secondary food chain
[C] Food web [D] Detritus food chain



Question No:6

Biological equilibrium is maintained with the help of:

[A] Producers and consumers
[B] Consumers and decomposers
[C] Herbivorous and carnivorous [D] Photosynthesis and respiration



Question No:7

In ecosystem, the nonliving components are:

[A] Less important than the living components
[B] Equally important as those of the living components
[C] More important than living components [D] None of the above



Question No:8

Cycling of material in ecosystem is entirely dependent upon:

[A] Producers and Consumers
[B] Primary producers and Herbivorous
[C] Herbivorous and Carnivorous [D] Producers and Decomposers



Question No:9

In a terrestrial ecosystems such as forests, maximum energy is found in which trophic level?

[A] T1
[B] T2
[C] T3 [D] T4



Question No:10

Trophic levels are formed by:

[A] Only plants
[B] Only animals
[C] Only carnivores [D] Organisms linked in food chains



Question No:11

If 20 kJ energy is available at producer level, then how much energy will be transferred to the lion in the food chain: producer —> deer —> lion?

[A] 0.2 J
[B] 0.02 J
[C] 0.002 J [D] 2J



Question No:12

Assertion: Forest, grassland and desert are example of terrestrial ecosystem.
Reason: Ecosystem is functional unit of nature.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false [D] If both the assertion and reason are false



Question No:13

Assertion: Vertical distribution of different species occupying different levels is called stratification.
Reason: Tree occupy top vertical strata of forest

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false [D] If both the assertion and reason are false



Question No:14

Assertion: Secondary productivity is defined as the rate of formation of new organic matter by producers.
Reason: Secondary productivity = GPP – R.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false [D] If both the assertion and reason are false



Question No:15

Assertion: Decomposers break down complex organic matter into inorganic substances like CO, HO and nutrients.
Reason: Detritivore breakdown detritus into smaller particles.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false [D] If both the assertion and reason are false