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Poisonous and Infectious Substances : These are the substances liable to cause death or serious injuries to health, if swallowed or inhaled or allowed to come in contact with skin. Infectious substances are those contaminated with disease inducing micro-organisms. The examples of poisonous substances are, pesticides, tetraethyllead and many drugs etc. The contaminated hospital wastes, strains of pathogens etc. Are considered infectious substances.
The effect of petrol on surface tension Being sure that the plate is has to be clean. It is wise to rinse the plate in cold water for a time before filling it. Instead of soap,
Analysis soil texture by Feel Method Soil texture was recognised from very early times by experienced farmers from the "feel" of moist soil placed between the thumb and the for
To show how water rises by capillarity Colour some water in a shallow dish with ink and touch a blotter to the water surface. Observe how the water increases in the blotter.
How Complement System Helps To Handle Microbial Invasion 1) Some components of a complement system coat microorganisms. These organisms with such a coat can be easily phagocyt
What is the earth made of? The overall composition of the Earth, in terms of elemental composition is as follows: Iron 34.6% Oxygen 29.5% Magnesium 12.7% Silic
Explain the Oxygen toxicity - Histotoxic Hypoxia Exposure to oxygen at increased pressure can produce a marked increase in the dissolved oxygen in blood. It produces toxic effe
Define the Regulation of Aldosterone Secretion Increased potassium ion concentration and decreased sodium ion concentration increases the aldosterone secretion. Renin-angiotens
How do you explain the fact that clay soils which commonly have higher pore space than sandy soils are often more poorly aerated than sandy soils. Clay soils have higher pore s
how many types of heterotrophic nutrition in plants?..
Explain Macrophages They are large, long living effective phagocytes, which enlarge out of monocytes. It is an irregular cell about 25-50 mm in size. It has a large ovoid nucle
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