NSTSE (National Science Talent Search Exam- Unified Council) Class 9: Questions 1862 - 1868 of 2000

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Question number: 1862

» Biology » Improvement in Food Resources

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Question

Fertility of the soil can be lost due to

Choices

Choice (4) Response

a.

Soil erosion

b.

Excessive grazing

c.

Excessive use of fertilizers

d.

All a. , b. and c. are correct

Question number: 1863

» Biology » Improvement in Food Resources

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Organic farming will be helpful in

Choices

Choice (4) Response

a.

reducing the harmful effect of chemical fertilizer on human beings

b.

improving crop production

c.

improving insect resistance

d.

Question does not provide sufficient data or is vague

Question number: 1864

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Steps in Genetic engineering include

Choices

Choice (4) Response

a.

Fusion with bacterial plasmid and introducing into bacteria

b.

Selection and extraction of desired gene

c.

Selection of transformed bacteria and its culture

d.

All a. , b. and c. are correct

Question number: 1865

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Which of the following is method of sterilization?

Choices

Choice (4) Response

a.

Autoclave

b.

Centrifugation

c.

PCR

d.

Electrophoresis

Question number: 1866

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Organic matter is important as

Choices

Choice (4) Response

a.

it increases fertility of soil

b.

it provides texture to soil

c.

increases water holding capacity

d.

All a. , b. and c. are correct

Question number: 1867

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Which of the following is associated with chlorophyll?

Choices

Choice (4) Response

a.

Mg

b.

Ca

c.

Fe

d.

Na

Question number: 1868

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Vermicomposting is

Choices

Choice (4) Response

a.

Preparation of compost using bacteria

b.

Preparation of compost using fungi

c.

Preparation of compost using Honey bee

d.

Preparation of compost using earthworms

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