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Discovery of Malaria

Give reason f...

Question

Give reason for following Mosquities population can be controlled by preventing stagnation of water

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Solution

Dear student,
This is because mosquitoes lay their eggs in the stagnant water. They do so because they get most of their nutrition from a large amount of the water after hatching. Thus, spreading a large number of diseases like dengue etc.
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Q. Question 26
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?

Q. Question 26
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?

The method by which pregnancy can be prevented and thus the population can be controlled is contraception.

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Q. How spraying oil on stagnant water controls the mosquito population?

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