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DISPOSAL OP CARCASS : After the experiment with an animal is over, the dead animal, i.e. carcass should not be left in the laboratory. The dead animals start decaying and putrefying by invasion of microbes and this leads to contamination and foul odour in the lab. The carcass may be of two types: (1) untreated animals (2) radioactive-treated animals. You must take care to wear apron and gloves while handling dead animals especially the ones treated with radioactive material. As said earlier this activity is a demonstration activity.
Softening water with chemicals Try making suds with a half test tube of hard water and a few drops of soap solution. Next boil a same sample and again try to make suds by usin
Define Nerve Cell The basic unit of the nervous system as studied above, is the individual nerve cell - the neuron. The nerve cells operate by generating electrical signals and
Photochemical Smog: Photochemical smog, a secondary Pollutant, results when the two pollutants, nitrogen oxide and hydrocarbons found in automobile exhausts, react with
Carbon atoms of fatty acids are numbered from carboxyl carbon. Various conventions are used to indicate the position of double bonds in the fatty acid molecules. Like,
What is an ionic crystal? An ionic crystal is one in which ionic bonds form the structure, or lattice, of the crystal. The ions that come together to form these structures must
advantages and disadvantages of protozoa
Foam extinguishers : If the burning liquid is in a container the jet should be directed at the inside edge of the vessel or at a vertical surface in order to break the jet and al
Explain the Complex Cells - Primary Visual Cortex They are sensitive to both orientation and movement. For example, a line or edge with a particular tilt might stimulate a comp
WHAT IS RESPIRATION ?
Method of science: We have seen above that science is an enaeavour to understand nature and to mould it to satisfy human needs. In earlier units we have seen that, in this pr
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