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Life 103 - Evolution and Biodiversity
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1st Year Biomedical Science Student Evolution and Biodiversity Notes Finished first year with a first
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103 – Evolution and BiodiversityLecture 1, 2 & 3 – Origin of Life
Biogenesis Vs. Abiogenesis
At some point life has to come out of something that is not living. Abiogensis
is something non living gives you something living (spontaneous generation).
- mice from wheat was a dutch experiment where some wheat grains
were put in a box and found mice there, so believed the wheat had
produced mice.
- Flies from meat was an italian experiment, they thought the flies were
coming straight from the meat
- There had to be at some point a step from non living to living
- Maybe it was one dramatic event with special set of circumstances?
- OR
- what we call ‘life’ evolved gradually from complex chemistry
Cellular Life
Segregation
Metabolism
Energy Growth Replication
Evolution
(response and adaptation)
Multicellular differentiation
Carbon Source?
CO2 …………………. Autotrophy (plants are photoautotrophs)
Organic Carbon …… Heterotrophy
Messenger
Transfer
Ribosomal
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