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Define the term - Soil protozoa
These are unicellular but larger than bacteria, the size varying from a few microns to a few centimeters. The protozoa exist in all aerable soils, but numerically form only a small part of the soil population. A fertile surface soil may contain 10,000 to more than a million of protozoa per gram of soil. Soil protozoa tolerate adverse environmental conditions such as moisture, acidity, and climate to a greater extent than other soil microbes. The role of protozoa in soil is not definitely known. As they feed on the bacteria and actinomycetes, they probably help to maintain a favourable balance of the microflora in soil.
Q.How are clouds formed? During day time, on being heated, a large amount of water evaporates from various water bodies and goes into the air. A part of this water vapour also r
Decay of Arab Culture and Science: The association of science with kings, wealthy merchants and nobles which was initially very fruitful, ultimately proved to be the weakness
Primary processing of pulses Dry pulse seeds have a tight and fibrous seed coat (husk or skin) that envelops the cotyledons, which often is indigestible and may have a bitter
To show the presence of nodules of nitrogen-fixing bacteria on the roots of legumes Carefully spade up some leguminous plant like as clover, alfalfa, soy-beans, cow peas, etc.
For moderately volatile liquid wastes : Spillage of moderately volatile liquids could be absorbed on sand, shovelled into bucket(s) and transported to a safe open area for evapora
Lifting water with air pressure Fit a test tube with a single-hole cork and glass tube. Drive out the air by boiling a little water in it. Invert it with the open end under the
Explain the Adrenal Medulla The adrenal medulla secretes epinephrine or adrenaline and norepinephrine or noradrenaline. The secretory cells of the medulla are modified postgang
Explain the Functions of Glucocorticoids Cortisol, cortisone and hydrocortisone are the names given to the glucocorticoids. What is their function in our body? They play a majo
Softening hard water by boiling Temporary hardness can be removed from water by boiling. Shake a little temporary hard water with a few drops of soap solution and see if you c
what is cell
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