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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.
Explain the Chemical Methods for Control of Microorganisms? Different chemicals can be used which can act as disinfectant, antiseptics or even chemical sterilants. These are:
What are synthetic auxins and what are their uses? Synthetic auxins, like indolebutyric acid (IBA) and naphthalenic acid (NAA) are substances same to IAA (a natural auxin) but
The plasma membrane is the outer membrane of the cell it delimits the cell itself and a cell interior with particular conditions for the cellular function. As it is selectively per
Olericulture: It concerned with the cultivation or development of vegetables yielding plants. Olericulture is the study of vegetable growing, dealing with the culture of non-woody
Adaptations to high wind velocity The mechanical force of the wind and the grinding action of sand, dust, snow and other materials driven by it cause the plants to adapt themse
protozoa and metazoa
Q. How many chambers do the mammalian heart and the bird heart have? Concerning temperature maintenance what is the benefit of the double and complete circulation of these animals?
What are cilia and flagella? Cilia and flagella are structures found in prokaryotes as well in eukaryotic cells. They play defense, nutrition and movement roles for the cell. I
Q. What is the endocrine function of the placenta? The placenta besides being the organ through which the exchange of substances between the fetus and the mother is done also h
What is Class Asteroidea ? Sea stars are probably one of the most recognizable of all Echinoderms. Often beautifully colored and symmetrical, they are predators that feed vorac
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