Yeast is used in the production of

1

(a)

sugar

(b)

alcohol

(c)

hydrochloric acid

(d)

oxygen

Alcohol is produced with the help of

1

(a)

sodium chloride

(b)

yeast

(c)

nitrogen

(d)

carbon dioxide

The two microorganisms which live in symbiotic association in lichens are

1

(a)

fungus and Protozoa

(b)

alga and bacteria

(c)

bacteria and Protozoa

(d)

alga and fungus

______________ is a nitrogen fixing bacteria.

1

(a)

Rhizobium

Carriers of specific microorganisms are called ___________________

1

(a)

vectors

Foot and mouth disease is caused by a ____________________

1

(a)

virus

Vaccine for smallpox was discovered by _____________________

1

(a)

Edward Jenner

All microbes are disease causing

1

(a) True

(b) False

Anthrax is the common disease in human and other animals.

1

(a) True

(b) False

Foot and mouth disease is a bacterial disease in animals.

1

(a) True

(b) False

Look at the diagram of four living things below

Fill in the table below with only the appropriate items:
A, B, C, D, Plants, Animals, Fungi, Microorganisms.

2

(a)

who discovered the vaccine for smallpox?

2

(a)

We add a little curd to warm milk to set curd for the next day. Why?

2

(a)

Ankur's mother told him to wash his hands with soap before eating because his hands might have bacteria. Ankur did not believe her because he could not see anything on his hands. Why couldn't Ankur see the bacteria on his hands? State how bacteria can be harmful to humans.

3

(a)

Curd is formed from the milk. Explain how.

3

(a)

Cooling helps in food preservation. How?

3

(a)

During biology class, teacher was telling about microbes and how they are useful to humans. Hearing this, Jasmine got confused as she knew the TB caused to her uncle is due to a microbe. She asked his teacher about it. The teacher appreciated her for question and explained the whole class.
(a) What are microbes?
(b) How are microbes helpful to humans?
(c) Name one microbe
(i) used in household products.
(ii) used in antibiotics.
(d) Mention two diseases other than TB caused by microbes.
(e) Identify the values shown by Jasmine.

5

(a)