Black Day | Black Day of Kashmir | 27 Sep

Black Day | Black Day of Kashmir | 27 Sep


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Biology Serve Mankind

Biology serve mankind in very fields. As follows 1) In the Field of  Health               Biology serves mankind in the field of health as follows. a. It has helped the men in combating fatal diseases like malaria, smallpox, tuberculosis etc. b. It has provided a cure for some diseases like cancer through radiotherapy and chemotherapy. c. We have been able to bring epidemics under control. d. We have reduced infants mortality rates etc. e. The science of biology serves mankind in coming to our rescue by finding means to increase food production and by controlling the increase in human population. God gives knowledge to biologists,,, that's why they serve humanity 2) In the Field of Agriculture: a. Biology serves mankind in agriculture by hydroponics possible whereby plants can be grown in solution or moist material containing minerals, instead of growing in soil. b. Biology has provided biological control for certain pest of food crops. c. Recentl...
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Different Methods of Filtration | Difficult Meanings

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Filtration Through Filter Paper | Difficult Meaning

Filtration Through Filter Paper Filtration by a glass funnel قیف and filter paper is usually a slow process. As the mixture is pouredانڈیلنا onto the filter paper, the solvent (water) passes through leaving behind the suspendedمعلق particles on the filter paper. Filter papers are available in a variety of porositiesباریک مسام یا سوراخ ( pore sizes). Which pore مسام size is to be used, dependsانحصار upon the size of particles in the precipitate. The filter paper should be large enoughکافی so that it is one-fourth to one-half full of precipitate at the end of filtration. The funnel should, in turn, be large enough for its rim درمیان to extend    1to 2 cm above the top circumferenceدائروی of the paper.If the process of filtration is to run smoothly, the stem of the funnel should remain continuously full of liquid as long as there is liquid in the conical portion. The stem of the funnel should be several inches long so that it can extendکنارہ a few centimetres down into the receiv...
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