NSTSE (National Science Talent Search Exam- Unified Council) Class 9: Questions 1793 - 1798 of 2000

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Question number: 1793

» Biology » Natural Resources

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Question

Soil erosion is

Choices

Choice (4)Response

a.

Removal of top layers of soil by water

b.

Removal of top layers of soil by wind

c.

Removal of top layers of soil by ranching and grazing

d.

All a. , b. and c. are correct

Question number: 1794

» Biology » Natural Resources

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Question

Which of the following provides protection to life?

Choices

Choice (4)Response

a.

Ozone layer

b.

Nitrogen

c.

Hydrogen

d.

Carbon-di-oxide

Question number: 1795

» Biology » Natural Resources

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Question

Nitrifying bacteria are those

Choices

Choice (4)Response

a.

Which converts atmospheric nitrogen into nitrites and nitrates

b.

Only the means of nitrification

c.

Have symbiotic relationship with leguminous plants

d.

Both a. and c. are correct

Question number: 1796

» Biology » Natural Resources

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Question

Chipko movement is associated with

Choices

Choice (4)Response

a.

Soil conservation

b.

Forest conservation

c.

Wetland conservation

d.

Water conservation

Question number: 1797

» Biology » Natural Resources

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Question

Denitrification is

Choices

Choice (4)Response

a.

nitrogen fixation

b.

removal of nitrogenous waste material

c.

conversion of atmospheric nitrogen into nitrates

d.

conversion of nitrates into nitrogen

Question number: 1798

» Biology » Natural Resources

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Question

Layer of earth that contains life is known as

Choices

Choice (4)Response

a.

Mantle

b.

Crust

c.

Outer core

d.

Inner core

Developed by: