spontaneous generation

what did redi’s experiment prove?

Provide provided strong evidence against the theory of spontaneous generation for large organisms. He proved that maggots did not spontaneously arise from decaying meat, but rather came from the eggs laid on the meat by flies.

What does spontaneous generation?

And now discredit a scientific theory that living organisms could arise or formed directly from nonliving or inanimate matter

Ex: the belief that mice could come from rags and wheat or the maggots could appear from rotting meat

Where did the maggots come from?

In redi’s experiment, the maggots came from eggs laid by the adult flies that had access to the uncovered meat. In the cupboard jars flies could not reach the meat to lay eggs, so no maggots appeared on the meat itself.

What did pastures experiment prove?

His experiment with curved neck flask, prove that living things even tiny ones like bacteria do not appear out of nowhere he showed that microorganisms in the air cause food or liquid to spoil not the air itself, and not some mysterious life force his experiment supported the idea called biogenesis, which means that all living things come from other living things

How to pasture test spontaneous generation

Pasture filled a special glass flask that had long curved swan shaped necks with broth, which is a liquid full of nutrients. He boiled the broth to kill any existing germs. The curved neck, let air in, but stopped dust and microbes from reaching the broth. As long as the broth didn’t touch the dust trapped in the neck it stayed clean and clear, but when pasture tilted the flask so that the broth touched the trapped dust. It quickly became cloudy with new microbial growth. This proved that microbes come from the air, not from the broth itself.