Question

29. Microorganisms are often referred to as the 'scavengers of the environment. Explain.
30. Gold is a very precious metal. Pure gold is very soft therefore, it is not suitable for making jewellery. It
is alloyed with either silver or copper to make it hard but sometimes jewellers mix a large quantity of
copper and silver in gold to earn more profit. Read the above passage and answer the following questions

[3]
ii. Why does government insist on purchasing hallmarked jewellery?
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Answer 1

Explanation:

yes, microorganisms are known as scavenger because they decompose the waste materials and clean the environment for that sake they are known as scavenger

Answer 2

Answer:

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