Give reasons for the following.
(a) Fresh milk is boiled before consumption while processed milk stored in packets can be consumed
without boiling.
(b) Raw vegetables and fruits are kept in refrigerators whereas jams and pickles can be kept outside.
(c) Farmers prefer to grow beans and peas in nitrogen deficient soils.
(d) Mosquitoes can be controlled by preventing stagnation of water though they do not live in water. Why?
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Answer:
(a)Answer. Fresh milk is boiled before consumption to kill the microorganisms in it. But packed milk is pasteurised and does not contain any microorganisms. It can thus be consumed without boiling.
Explanation:
(b) Raw vegetables and fruits are kept in refrigerators whereas pickles and jams are kept outside. It is because pickles and jams contains some preservatives such as sugar, salt and other ingredients in them. Though, pickles and jams do not easily get spoil by bacteria, air or other factors when you are kept them outside
(c)
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