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Introduction : In any laboratory dealing with biological experiments, hazards can occur mainly due to chemicals and biological materials. In the previous exercise you have done the activity of classifying hazardous chemicals and you also learnt the skill of handling such chemicals. In this exercise you will carry out the activities related to the disposal of biological materials after the experimental work with such materials is over. Disposal activities are related to microorganisms and dead animals. Since these materials cause contamination and infections very rapidly, more care is required in their disposal. Disposal of plant materials is comparatively simpler. Put all the used plant materials in a disposable bag, seal or tie the bag and put it in the waste collecting bins.
What is Soil Aeration Whatever may be the structure of aggregate, it introduces pores in the soils. These pores are filled by air and/or water and have a role in the plant grow
what makes a mineral a mineral? The properties of minerals: There are seven main properties that are used to describe and classify any mineral found. All seven properties are
how can isolated brown dwarf passing between another star and the earth could be detected?
How to make a devil diver (Cartesian diver) Find a tall glass jar with a quite wide mouth. Wrap a few turns of copper wire about the thin part of the rubber bulb from a medicin
advantages and disadvantages of centralised cataloguing
Polysomnography is a health care field with strong technical applications. To be effective, sleep technicians must have a strong health care background and be able to identify tech
Freezing by Contact with a Cooled Gas Different methods are available for freezing by contact with cooled gas. These include: i) Cabinet Freezing: This method involves ci
The effect of rain on sloping soil Fill a shallow pan or box with firmly packed soil. Set the pan outside in the rain with one end increased slightly. Observe how the raindrops
Determine about the soil humus The organic constituents (organic colloids) are due to mainly the plants and partly the animals. They form only a small fraction and get transfo
Explain Mucous membranes - External Defence Mechanism Mucous membranes: The digestive, urinary, genital and respiratory tracts open out at one or both ends. They do not have a
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