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NEET

Explore popular questions from Ecology and Environment for NEET. This collection covers Ecology and Environment previous year NEET questions hand picked by experienced teachers.

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Physics

Chemistry

Biology

Ecology and Environment

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Q 1. Which ecological factors are most strong determinants of various biomes?

Temperature and precipitation

B

Soil and wind

C

pH and humidity

D

Light and wind

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Q 2. 25 hot spots of the world occupy an area of

A

0.20%

B

0.40%

C

0.80%

1.40%

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Q 3. Species diversity ______ as we move away from the _____ towards _______.

A

Increases , Equator, poles

Decreases, Equator, poles

C

Decreases, Poles , Equator

D

None of these

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Q 4. In ecosystem lithosphere is concerned with

A

Gases

Minerals

C

Water

D

All the above

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Q 5. The net primary productivity of an ecosystem is

Total weight of green plants - respiratory losses

B

Total weight of green plants + respiratory losses

C

Respiratory losses alone

D

None of the above

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Q 6. Primary producer of an ecosystem is

A

Herbivores

B

Carnivores

C

Both (a) and (b)

Green plants

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Q 7. When food energy passes from herbivores to carnivores

A

Some energy is increased

Some energy is decreased

C

Remain unchanged

D

Not relevant

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Q 8. Which of the cycle is concerned with energy flow in the ecosystem

Food cycle

B

O2 cycle

C

Cl2 cycle

D

All the above

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Q 9. Which group of living organisms given below is a link in food chain between green plants and hawk

Grasshopper, frog and snake

B

Grasshopper, rat and snake

C

Millipedes, centipedes and sparrow

D

Earthworm, hen and rat

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Q 10. Which one statement is correct regarding man made ecosystem

A

They are highly efficient

B

They are poor in diversity

C

They are vulnerable to drought, floods and diseases

All are correct

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Q 11. Phosphorus usually becomes a limiting factor at certain times of the year in which ecosystem

Aquatic ecosystem

B

Grassland ecosystem

C

Forest ecosystem

D

All the above

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Q 12. Whale is

A

Primary producer

Carnivorous secondary consumer

C

A decomposer

D

Herbivorous

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Q 13.

The above represents

A

Food chain

Food web

C

A population

D

Ecosystem

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Q 14. A natural ecosystem

A

Depends on man

B

Depends on plants

C

Depends on animals

Is auto-operated

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Q 15. Which of the following in an ecosystem exhibits one-way flow rather than cyclic flow

A

Potassium

B

Carbon

Free energy

D

Nitrogen

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Q 16. Dynamic aspect of an ecosystem is

A

Producer and energy flow

B

Producer and mineral cycles

C

Consumer and mineral cycles

Energy flow and mineral cycles

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Q 17. Most important determinant of marine ecosystem is

A

Rainfall

B

Geographical location

Depth or distance from the shore

D

All the above

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Q 18. The trophic level of Cuscuta, Orobanche and Albugo is

A

Decomposer

B

Primary producer

Primary consumer

D

Secondary consumer

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Q 19. An ecosystem resists change because it is in a state of

Homoeostasis

B

Regular illumination

C

Static imbalance

D

Food accumulation

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Q 20. Idea of productivity of an ecosystem can be had from

A

Pyramid of number

Pyramid of biomass

C

Height of the plant

D

Development of foliage

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Q 21. The pyramid of biomass and the pyramid of number represent

A

The rate of energy flow

B

The rate of food production

C

Standing crop

Relationship among organisms

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Q 22. The pyramid of energy is the best representation of an ecosystem because it indicates

A

Relation of all plants and animals

B

Total energy present in an ecosystem

The rate of food flow through the food chain

D

None of these

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Q 23. In an ecosystem, the largest population is of

Producers

B

Consumers

C

Decomposers

D

Omnivores

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Q 24. Herbivores are called

A

Primary consumers

B

Secondary producers

C

Key industry animals

All the above

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Q 25. The total rate of photosynthesis including the organic matter used up in respiration during definite period is known as

Gross primary productivity

B

Net primary productivity

C

Secondary productivity

D

None of above