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Biology
2. Micro-Organisms: Friends and Foe
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Q39 of 104 Page 39

Name two leguminous plants which can fix nitrogen.

Leguminous plants such as beans and peas can fix nitrogen.


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37

What type of plants can fix nitrogen gas of the air into compounds of nitrogen?

38

Name the micro-organisms present in the soil and in the root nodules of leguminous plants which can fix atmospheric nitrogen.

40

Fill in the following blanks with suitable words:

(a) Alcohol is produced with the help of ............


(b)Blue-green algae fix................directly from air to enhance fertility of soil.


(c) Micro-organisms can be seen with help of a..........


(d) Cholera is caused by..............


(e) Common salt has been used to preserve............. and ............ for ages.


(f) The food material which is preserved by pasteurization is .................


(g) As a result of nitrogen cycle, the percentage of nitrogen in the atmosphere remains more or less…….

41

How do viruses differ from other micro-organisms such as bacteria?

Questions · 104
2. Micro-Organisms: Friends and Foe
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