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A . Choose the correct option.
1. Vaccine for smallpox is discovered by
a) Louis Pasteur
b) Alexander Fleming
c) Edward Jenner
d) John Mendal


2. Mushroom belongs to
a) Algae
b) Virus
c) Fungi
d) None of these

3. Malaria is caused by
a) Protozoa
b) Virus
c) Algae
d) Bacteria

4. Microorganisms are
a) Unicellular
b) Multi-cellular
c) Both
d) None of these

5. Penicillium is a
a) Algae
b) Fungus
c) Bacteria
d) Yeast

6. Rhizobium bacteria
a) Help in digestion
b) Help in nitrogen fixation
c) Cause diseases
d) All of the above


7. In order to take precautionary steps to control dengue, we must take measures to stop the breeding of
a) Aedes mosquito
b) Fleas
c) Fire ants
d) Anopheles mosquito

8. The bacterium present in curd is
a) Aspergillus
b) Lactobacillus
c) Penicillin
d) Vibrio cholera

9. While baking cakes, yeast reproduces rapidly and produces ___ gas.
a) Hydrogen
b) Oxygen
c) Carbon dioxide
d) Nitrogen

Which among the following statements is not associated with food preservation?

a) Prevention of decay or spoilage

b) Decreased shelf life

c) Air-tight sealing

d) Storage for future use​

Sagot :

Answer:

2. fungi

4. none of these

5. bacteria

9.carbon dioxide

10. decreased shelf life

Explanation:

mushroom makes spores which only fungi make

food preservation implies making it last longer

if it was hydrogen or nitrogen the food would explode.

also I am sorry I

do not know all of these.

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