Ecology and Environment-Organisms and Environment (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Biology): Questions 1 - 4 of 34

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Question number: 1

» Ecology and Environment » Organisms and Environment » Population and Ecological Adaptations

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MCQ▾

Question

What is a keystone species?

Choices

Choice (4) Response

a.

A rare species that has minimal impact on the biomass and on other species in the community.

b.

A species which makes up only a small proportion of the total biomass of a community, yet has a huge impact on the community’s organization and survival.

c.

A common species that has plenty of biomass, yet has a fairly low impact on the community’s organization.

d.

A dominant species that constitutes a large proportion of the biomass and which affects many other species.

Question number: 2

» Ecology and Environment » Organisms and Environment » Habitat and Niche

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MCQ▾

Question

Which one statement is correct regarding man made ecosystem?

Choices

Choice (4) Response

a.

All are correct

b.

They are highly efficient.

c.

They are vulnerable to drought, floods and diseases.

d.

They are poor in diversity.

Question number: 3

» Ecology and Environment » Organisms and Environment » Habitat and Niche

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MCQ▾

Question

In the mountains, there is a lot of moisture and water and still the plants are xerophytes, because

Choices

Choice (4) Response

a.

Water runs away due to the presence of slopes and cannot be used by plant (physiological dryness).

b.

Water turns into snow on mountains.

c.

Rocks of mountains cannot absorb water.

d.

None of the above

Question number: 4

» Ecology and Environment » Organisms and Environment » Habitat and Niche

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MCQ▾

Question

Which of the following changes would be likely to make terrestrial life on this planet impossible?

Choices

Choice (4) Response

a.

A decrease in mean temperature by 10 degree C.

b.

Disappearance of the moon.

c.

Change in atmosphere permitting the entire solar radiation reaching the upper atmosphere to penetrate to the surface of the earth.

d.

Change in the orbit of the earth from an ellipse to a surface of the earth.

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