CBSE (Central Board of Secondary Education) Class-8 Science: Questions 66 - 72 of 465

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Question 66

Question MCQ▾

Friendly micro-organisms are:

Choices

Choice (4)Response

a.

Lactobacillus, Penicilliumnotatum

b.

Azotobater, Sea weeds

c.

Salmonella typhi, Bacillus anthracis

d.

Both a. and b. are correct

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Question 67

Question MCQ▾

Common method of food preservation that is used to stop the growth of moulds and bacteria on food is:

Choices

Choice (4)Response

a.

Salting

b.

Drying

c.

Deep freezing

d.

Pickling

Edit

Question 68

Question MCQ▾

Algae having cup shaped chloroplast is:

Choices

Choice (4)Response

a.

Spirogyra

b.

Chlamydomonas

c.

Chlorella

d.

Both b. and c. are correct

Edit

Question 69

Question MCQ▾

Symbiotic bacteria present in the human intestine is

Choices

Choice (4)Response

a.

Escherichia Coli

b.

Lactobacillus

c.

Bacillus anthracis

d.

Pneumococcus

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Question 70

Question MCQ▾

What is a buffer stock?

Choices

Choice (4)Response

a.

Drying of grains before storage

b.

Some stocks of grains maintained for the shortage.

c.

Large scale storage of grains

d.

Storage of grains in granaries

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Question 71

Question MCQ▾

Ploughing is also called as

Choices

Choice (4)Response

a.

breaking of crumbs

b.

Tilling

c.

Levelling

d.

Loosening of soil

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Question 72

Question MCQ▾

Name micro-organisms which increases soil fertility is:

Choices

Choice (4)Response

a.

Rhizobium

b.

Anabaena and Nostoc

c.

Azotobacter

d.

All a., b. and c. are correct

Edit