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 |
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 |
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 |
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 |
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 |
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 |
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 |