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How soap helps water in cleaning
Prepare two greasy cloths by smearing kitchen fat or vaseline on cloths. Wash one sample in warm water without soap. Wash the other sample in warm water with heavy soap suds. Hang the samples to dry and observe which one was made cleaner by washing.
Explain the History and Milestones of the Concept of Blood In this section, we will discuss about the historical development of the concept of blood and blood cells. This discu
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The Copernican Revolution: It was right in the midst of these developments in the fifteenth century, that there came the first major break from the whole system of ancient thou
Explain Skin Secretions - External Defence Mechanism The oil and sweat secreted by sebaceous and soporiferous glands contains fatty and lactic acids, which makes the surface of
Hormonal system: Most of us are not even aware that another system works constantly, along with the nervous system and the muscles, to direct our bodily functions. The system
Q. When are conditions right for harvesting a crop for local and distance markets? The conditions right for harvesting a crop for local markets: harvest in the early morning t
Define age related changes in Immune mechanisms The immune competence decreases with age. This affects the cell-mediated and humoral immunity. We will learn about these aspect
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DISPOSAL OF WASTE MATERIALS : In a school or college science laboratory, chemical wastes, broken glassware, unserviceable non consumable items, obsolete instruments, used biologic
The Asteroid Belt-Rubble of the Solar System: There is a gap of 547 million kilometers, between the orbits of Mars and Jupiter. In this gap are thousands of bodies made of ro
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