25.1 urey miller experiment Flashcards
when was earth formed
4.6 billion yago
conditions before life
dust and clouds covered the sun
no water since heat from collisions vaporized it
3.9 by a conditions
the violent phase ends and atmosphere has
- water vapor
- nitrogen
- co2
- methane
- ammonia
- hydrogen
- hydrogen sulfide
oparin and haldane hypothesis
earth’s early atmosphere was a reducing (electron adding) environment in which organic compounds could have formed from simple molecules
with the energy coming from lightning and UV radiation
urey miller experiment made
amino acids and other organic compounds
where can amino acids come from also
meteorites
-carbonaceous chondrites
they are 1-2% carbon and have more than 80 amino acids
how do we know carbonaceous chondrites are not contaminated from earth?
they had both D and L isomers and organisms only make and use L isomers
