Bio+abiogenisis Flashcards
What does bio mean? What does Genesis mean?
Bio means life and Genesis means beginning.
What is Biogenesis?
Biogenesis means life comes from life
What is abiogenesis?
It means life comes from non-life.
What did Aristotle believe? Biogenesis or abiogenesis? In what time was this?
He believed frogs came from mud puddles. Abiogenesis. Ancient times.
Who believed in the “mouse recipe”?
Jean Van Helmont
What was Jean Von Helmont’s belief? What was present? Abio or biogenesis?
Mice came from dirty clothes and grains of wheat.
Dirty clothes+wheat =mice
Presents of the ‘active principle’ in the air
Abiogenesis
Who was Francisco Redi? What was his experiment? Abiogenesis or biogenesis? What was his second experiment?
Francisco Redi was the first scientist to use a control group. His experiment was that he put two jars with meat in them. One with a lid and one without, the one without got maggots and the one with got no maggots. People said he left the active principle out so his 2nd experiment used gauze as one lid and one without a lid so that the air could still flow. He proved flys came from maggots. Biogenesis.
Who was the first scientist to use a control group and the scientist who used gauze to prove flys came from maggots?
Francisco Redi.
What did John Needham do? Biogenesis or abiogenesis?
He boiled meat in a loosely sealed flakes. Boiled broth, fire, no bacteria, no lid. Then he boiled another broth, fire, with a lid and bacteria grew on the glass. The vegetative force was “present”. The problem was that it was too loosely sealed. Abiogenesis.
What was Spallanzani’s experiment? Biogenesis or abiogenesis?
He put broth in two glasses, both with fire. One was melted shut and one was left open. The one with the lid didn’t get bacteria but the one without the lid got bacteria. Biogenesis.
What was pasteur’s experiment? Biogenesis or abiogenesis?
He used a swan necked flask to end controversy. The one that was left open grew bacteria in the neck of the flask.
Who was so intimidated they left the debate? Who coined the term biogenesis?
Pouchet left the debate and Virchow coined the term biogenesis.
