Question
Which of the two diffuses faster: a liquid or a gas?
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Write down one drawback of artificial system of classification.
Enlist four types of diseases of animals which can also be transmitted to human beings.
Which method is most effective for destroying insects in stored grains, spraying or fumigation?
$\text{CO}^{2-}_3$
Why bryophytes and pteridophytes grow in moist and shady places?