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Louis Pasteur (1860-1862) French):
Even after the experiments of Spallanzani, the conflict of a biogenesis and biogenesis continued well into the middle of 19th century till Louis Pasteur famous for Germ Theory of Disease and Immunology finally disproved a biogenesis and proved biogenesis. He kept the sterilized syrup of an infusion of yeast and sugar in flasks and observed that a rich bacterial growth appeared in the syrup if it was exposed to air pollution. But no bacteria growth appeared in the flasks were either kept airtight of only purified air was allowed into them. How could Pasteur get pure air? For this he used a simple, but ingenious device, he heated the necks of some of his flasks and drew these into long shaped open tubes When air entered into these flasks, all air borne particles, including spores, germs etc. Got stuck at the bends of the tubes, so that only pure air reached the syrup. Hence, the syrup remained sterile. This conclusively proved that even micro organisms never form spontaneously upon present earth.
Regarding solubility, how are lipids classified? Fats and oils are hydrophobic molecules, i.e., they are non polar and insoluble in water. Lipids in general are molecules with
A (w+/ w+) red-eyed Drosophila female is crossed with a white-eyed male. Assuming the trait for eye colour is sex-linked, what are the possible phenotypes of the progeny?
Cleavage and Blastocyst Even though the cleavage is complete and all the blastomeres are of more or less equivalent size. Synchronization of mitoses in the blastomeres is los
cell wall of prokaryotic cell consist of what???
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HUMA N CHROMOSOMES The normal diploid (2N) chromosome number in human being is 46. It was given by T.H. Tjio and A. Levan in 1956. The chromosome complement of a cel
Q What is the mass transportation across the cell membrane? Mass transportation is the exiting or the entrance of substances in or from the cell engulfed by portions of membran
Disorder of Parathyroid Function: The disorders of parathyroid function may either lead to increased production or decreased production of parathormone. Hypoparathyroid
Why is the proximity between ribosomes and amino acids important for the protein formation? What is the enzyme that catalyzes that reaction? The proximity among ribosomes and a
Q. Explain False Positive Tests? As ST depression has been equated with CAD, patients with this finding who have less than a critical coronary narrowing has been called false p
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