Ecology and Environment-Organisms and Environment (NEET Biology): Questions 1 - 4 of 16

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Question number: 1

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

MCQ▾

Question

What is a keystone species?

Choices

Choice (4) Response

a.

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

b.

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

c.

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

d.

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.

Question number: 2

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

MCQ▾

Question

Which one statement is correct regarding man made ecosystem?

Choices

Choice (4) Response

a.

They are poor in diversity.

b.

All are correct

c.

They are highly efficient.

d.

They are vulnerable to drought, floods and diseases.

Question number: 3

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

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.

Rocks of mountains cannot absorb water.

b.

Water turns into snow on mountains.

c.

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

d.

Question does not provide sufficient data or is vague

Question number: 4

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

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

d.

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

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