Prevention is better than cure' justify with regard to TDA abuse.

Comment on the following statement. “Prevention is better than cure. It’s better to control the population of mosquitoes than using mosquito nets.”

(A): Potentiometer is much better than a Voltmeter for measuring emf of cell (R): A potentiometer draws no current while measuirng emf of a cell at balancing point.

Select the true statement. I) AIDS has no cure prevention is the best option. II) During HIV infection, the person suffers from fever, weight loss and diarrhoea. III) HIV is a retrovirus, which means its genetic material is DNA

Given below are a few statements related to external fertilization (I) The male and female gametes are formed and released simultaneously. (II) Only a few gametes are released into the medium (III) Water is the medium in a majority of organisms exhibiting external fertilization (IV) Offspring formed as a result of external fertilization have better chances of survival than those formed inside an organism.

Identify the correct statements from the following : i. In the presence of UV light , CF_(2)Cl_(2)(g) gives chlorine free radicals which will react with O_(3) (g) to form O_(2) (g). ii. Drinking water with 10 ppm fluoride is better than drinking water with 1 ppm fluoride. iii. The maximum permissible concentration of lead in drinking water is 50 ppb.

Give reasons. LPG is a better domestic fuel than wood.

________is better than soap for washing clothes in hard water.

Explain why The size of the needle of a syringe controls flow rate better than the thumb pressure exerted by a doctor while administering an injection.