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Explain the Phagocytosis
Phagocytosis includes the ingestion of particulate material including complete pathogenic microorganisms. The plasma membrane expands around the particulate material to form large vesicles known as phagosomes. It is performed either by neutrophils or macrophages. Neutrophils are very effective against pus forming (pyogenic) bacteria. We already know that macrophages are tissue phagocytes and are derived from circulating monocytes. These monocytes and macrophages together contribute to the phagocytic system (reticulo endothelial system). Macrophages are most effective against those microorganisms which live within the cells.
Why chemical fertilizers should be supplemented by organic manure? Exclusive use of chemical fertilizer will eliminate organic matter and thus organisms from the soil. Important
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What is ethics
Making a housing box for weather instruments Some of your weather instruments must be uncovered to the weather. Between these are the wind vane, the wind speed indicator and th
A simple mercury barometer Seal single end of a glass tube about 80 cm in length by rotating it in a gas flame. The tube should be held as almost vertical as possible. Join a s
Observe how a metal tyre is fitted on the wheel of bullock cart
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