CBSE Class-8 Science: Questions 49 - 57 of 469

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Question number: 49

» Microorganisms: Friend and Foe » Microorganisms » Bacteria and Fungi

MCQ▾

Question

Fungi which emit light is

Choices

Choice (4) Response
a.

Penicilliumnotatum

b.

Downy mildew

c.

Armillariamellea

d.

Rizopus

Question number: 50

» Crop Production and Management » Agricultural Practices » Crop

MCQ▾

Question

Agriculture is a science that deals with

Choices

Choice (4) Response
a.

health and development of plants

b.

Growth, development and culture of plants and animals for food and human use

c.

Food and tools of plants

d.

Growth and culture of plants and animals

Question number: 51

» Crop Production and Management » Manure and Fertilizers » Manure

MCQ▾

Question

Follow to replenish the lost nutrients is called

Choices

Choice (4) Response
a.

Manuring

b.

Crop rotation

c.

Fallowing

d.

Transplantation

Question number: 52

» Microorganisms: Friend and Foe » Food Preservation » Heat and Cold Treatments

MCQ▾

Question

Pasteurization is used for preservation of

Choices

Choice (4) Response
a.

Vegetables

b.

Milk

c.

Fruits

d.

Drinks

Question number: 53

» Microorganisms: Friend and Foe » Microorganisms » Bacteria and Fungi

MCQ▾

Question

Largest fungi which is also used as food is

Choices

Choice (4) Response
a.

Mildews

b.

Mushrooms

c.

Yeast

d.

Mould

Question number: 54

» Crop Production and Management » Agricultural Practices » Crop

MCQ▾

Question

Crops are classified on the basis of

Choices

Choice (4) Response
a.

Direction of winds

b.

Length of days and night

c.

Seasons

d.

Monsoons

Question number: 55

» Microorganisms: Friend and Foe » Microorganisms » Bacteria and Fungi

MCQ▾

Question

The bacteria helps in the formation of curd is:

Choices

Choice (4) Response
a.

Azotobacter

b.

Acetobacteraceti

c.

Lactobacillus

d.

Salmonella typhi

Question number: 56

» Crop Production and Management » Irrigation » Sources of Irrigation

MCQ▾

Question

What are the sources of irrigation?

Choices

Choice (4) Response
a.

Tube-wells

b.

Canals

c.

Wells

d. All a. , b. and c. are correct

Question number: 57

» Microorganisms: Friend and Foe » Commercial Use of Microorganisms » Vaccine

MCQ▾

Question

Diseases prevented by vaccination are

Choices

Choice (4) Response
a.

Diphtheria, Cholera

b.

Dengue and Malaria

c.

Small pox, tuberculosis, measles

d. Both a. and c. are correct

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