Match the following: Column I Column II (a) Lactobacillus (i) Algae (b) Aspergillus (ii) Protozoa (c) Spirogyra (iii) Fungi (d) Paramecium (iv) Bacteria

(a)- (iv) Bacteria can be of various shapes. They play an important role in our life. Lactobacillus is a rod-shaped bacterium found in the curd. (b)- (iii) Fungi are a group of heterotrophic microorganisms which do not have chlorophyll and feed on dead and decaying matter. For e.g. Aspergillus . (c)-(i) Algae are microscopic unicellular or multicellular plant-like microorganisms. They are photoautotroph. For e.g. Spirogyra . (d)-(ii) Protozoa are a group of unicellular microorganisms which shows animal like features. Diseases like dysentery and malaria are caused by protozoans. Paramecium is a protozoan. Column I Column II (a) Lactobacillus (i) Bacteria (b) Aspergillus (ii) Fungi (c) Spirogyra (iii) Algae (d) Paramecium (iv) Protozoa

Match the items given in Column I with those of Column II. Column I Column II (a) Polio (i) Legumes (b) Malaria (ii) Antibiotics (c) Rhizobium (iii) Yeast (d) Alexander Fleming (iv) Viral disease (e) Bread making (v) Protozoan disease

(a)-(iv) Microorganisms are the organisms which can not be seen through naked eyes. Many diseases are caused by such pathogens. Polio is a viral disease transmitted by air or water. It can be prevented by vaccination. (b)-(v) Malaria is a vector-borne protozoan disease transmitted by female anopheles mosquito. It can be prevented by using mosquito net and repellents. (c)-(i) Rhizobium is a rod-shaped bacterium found in the roots of leguminous plants. It helps in nitrogen fixation. (d)-(ii) The chemical preparations which are used to stop the growth of microorganisms are called antibiotics. Alexander Fleming discovered the first antibiotic by a Penicillium mould. It is used to treat many bacterial infections. (e)-(iii) Yeast is a fungus used in bread making. It is widely used in the baking industry. It is also used in the preparation of alcohol through fermentation. Column I Column II (a) Polio (iv) Viral disease (b) Malaria (v) Protozoan disease (c) Rhizobium (i) Legumes (d) Alexander Fleming (ii) Antibiotics (e) Bread making (iii) Yeast

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All in One - SCIENCE CBSE Class 8>Chapter 2 - Microorganisms: Friend and Foe>Chapter Practice>Q 6

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Edward Jenner discovered the process of fermentation.

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Important Questions on Microorganisms: Friend and Foe

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All in One - SCIENCE CBSE Class 8>Chapter 2 - Microorganisms: Friend and Foe>Chapter Practice>Q 7

Foot and mouth disease is a bacterial disease in animals.

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All in One - SCIENCE CBSE Class 8>Chapter 2 - Microorganisms: Friend and Foe>Chapter Practice>Q 8

Microorganisms can be found only in air and water.

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All in One - SCIENCE CBSE Class 8>Chapter 2 - Microorganisms: Friend and Foe>Chapter Practice>Q 9

Protozoa causes disease like dysentery and malaria.

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All in One - SCIENCE CBSE Class 8>Chapter 2 - Microorganisms: Friend and Foe>Chapter Practice>Q 10

Jams, jellies and squashes are preserved by adding salt.

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All in One - SCIENCE CBSE Class 8>Chapter 2 - Microorganisms: Friend and Foe>Chapter Practice>Q 11

The element nitrogen cannot be utilised by the living organisms.

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All in One - SCIENCE CBSE Class 8>Chapter 2 - Microorganisms: Friend and Foe>Chapter Practice>Q 12

Viruses can be seen by simple microscope.

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All in One - SCIENCE CBSE Class 8>Chapter 2 - Microorganisms: Friend and Foe>Chapter Practice>Q 1

Match the following:

Column I	Column II
(a) Lactobacillus	(i) Algae
(b) Aspergillus	(ii) Protozoa
(c) Spirogyra	(iii) Fungi
(d) Paramecium	(iv) Bacteria

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All in One - SCIENCE CBSE Class 8>Chapter 2 - Microorganisms: Friend and Foe>Chapter Practice>Q 2

Match the items given in Column I with those of Column II.

Column I	Column II
(a) Polio	(i) Legumes
(b) Malaria	(ii) Antibiotics
(c) Rhizobium	(iii) Yeast
(d) Alexander Fleming	(iv) Viral disease
(e) Bread making	(v) Protozoan disease

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