Biology [NSTSE (National Science Talent Search Exam- Unified Council) Class 9]: Questions 478 - 483 of 518

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Question 478

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Question

MCQ▾

Principle of biogas production is

Choices

Choice (4)Response

a.

Decomposition and Degradation

b.

Fermentation

c.

Methanogenesis

d.

Question does not provide sufficient data or is vague

Question 479

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Question

MCQ▾

Which of the following contains unsaturated fatty acids?

Choices

Choice (4)Response

a.

Butter

b.

Ghee

c.

Oil

d.

Question does not provide sufficient data or is vague

Question 480

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Question

MCQ▾

Cyanobacteria or blue green algae are blue green in appearance due to presence of

Choices

Choice (4)Response

a.

Chlorophyll a

b.

Chlorophyll b

c.

C phycocyanin

d.

Both b. and c. are correct

Question 481

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Question

MCQ▾

Chemicals that is used to kill insects is known as

Choices

Choice (4)Response

a.

Rodenticides

b.

Insecticides

c.

Pesticides

d.

Herbicides

Question 482

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Question

MCQ▾

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 483

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Question

MCQ▾

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