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This is used to focus the microscope. It is used with the high power objective to bring the specimen into better focus. -
Galileo Galilei Galileo Galilei perfected the first device known as a microscope.the first device known as a microscope. -
Redi went on to demonstrate that dead maggots or flies would not generate new flies when placed on rotting meat in a sealed jar, whereas live maggots or flies would. This disproved both the existence of some essential component in once-living organisms, and the necessity of fresh air to generate life.
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Needham established from his observations that micro-organisms do not grow from eggs and proposed a theory of spontaneous generation whereby living organisms develop from non-living matter at the microscopic level. -
Spallanzani is well known for one of his major works on microscopical observation that concerned the systems of spontaneous generation -
The cell theory states that all biological organisms are composed of cells; cells are the unit of life and all life come from preexisting life. -
What is the cell theory?
The cell theory states that all biological organisms are composed of cells; cells are the unit of life and all life come from preexisting life. -
He pioneered the study of molecular asymmetry; discovered that microorganisms cause fermentation and disease; originated the process of pasteurization; saved the beer, wine, and silk industries in France; and developed vaccines against anthrax and rabies. -
They found that organic molecules could be spontaneously produced under reducing conditions thought to resemble those of early Earth. -
She formulated the symbiotic theory of evolution (SET), which deals with the interconnection of prokaryotic and eukaryotic cells (cells with nuclei), explaining the emergence of new species by a mechanism known as “symbiogenesis”. -
