unit bio
what are the five charateristics of living things
need energy, produce waste, respond to stimuli and adapt, reproduce, and grow
cell theory
all organisms are made of one or more cells, smallest functional unit of life and are produced by other cells
artistotle
he developed the theory of spontaneous generation or abiogenesis. that states that living organisms developed from non living organisms. this would explain how maggots appeared from rotten materials. this theory was accepted for over 2000 years
francesco redi
he was the first to test aristotles theory. he placed meat in three jars, one open, closed and one with a guaze. the open and gauzed one had maggots but the closed one was empty
louis pasteur
he believed that air was not a charachersitic of life. he got a swan neck flask and filled it with broth snd boiled it to force air out and kill microbes. several days later the flasks were clear. proved biogenesis
what is biogensis
this states that living organisms can only cone from other living organisms
robert hooke
he observed dead cork cells under a microscope and saw the cork was made of tiny little rooms or boxes. he named them cells