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Q. Illustrate the tyndallisation?
John Tyndall devised a process of sterilisation by steaming for a few minutes at 100o C on 3-4 successive operations separated by 24 hour intervals at room temperatures. The principle is that the first exposure kills all vegetative bacteria; spores will germinate and be killed on subsequent occasions.
Leaf silhouettes Place a leaf on a sheet of white paper and hold it securely with thumb or finger. Press a piece of natural or artificial sponge next to an ink pad. With short,
Infectious bovine rhinotracheitis (IBR) The disease is caused by a Bovine Herpesvirus -I belonging to the family Herpesviridae and subfamily Alphaherpesvirinae. It is a DNA vi
Q. What are the procedures of the photochemical stage of the photosynthesis process? Photolysis of water, with liberation of molecular photophosphorylation and oxygen of ADP, w
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organism that can not exist in the presence of oxygen ?
What is the life cycle of the hookworms? Adult hookworms within the human intestine release eggs that are eliminated with the human feces. Under adequate conditions of moisture
Explain Water as a lubricant? All fluids have lubricating as they can make it easier for the solid materials to slip over one another. Water-based fluids act as lubricants in
Making a rock collection A collection of the common rocks found in the community can be made by asking every pupil to bring in single piece of rock. Explain to the pupils that
Is fecundation in amphibians external or internal? In this aspect are amphibians evolutionarily proximal to fishes or to reptiles? In the majority of the amphibian species fec
Define Bioactive Substances from Protein Foods? Bioactive substances are derived from living organisms that can be used by humans for a variety of applications. They are consti
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