origins of life and water proprieties Flashcards
what happened first?
The earth was formed
which macromolecules formed first?
proteins and nucleic acids
Where was the most of life first found?
In the water (ex. blue-green cyanobacteria)
what happened after the simple life forms were in the ocean?
free oxygen forms and creates the ozone (o3) which shields the earth from harmful rays which allows things to be able to form.
eukaryote form by?
endosymbiosis
plants/animals/and fungi are formed by.?
multicellular eukaryotes
what did the sun do to the first atmosphere??
striped it away.
what was formed by the volcanic outgassing?
the second atmosphere
what gas was missing in the early atmosphere?
oxygen
what is chemical synthesis?
the construction of complex chemical compounds from simpler ones.
what is panspermia?
The idea that life was from space
miller and Urey did what?
created the conditions of early earth by using ammonia, methane, water, and hydrogen then added an electric charge.
What was the result f Miller and Ureys experiment?
amino acids were formed
what was found on a meteorite that supports panspermia?
The meteor was carbon rich and had organic compounds LIKE amino acids on it
some possibilities for where life began?
- ocean near hydrothermal vents
- hot springs
- small pools of water (tide pools)
- inside rocks
