EIGHT
Emergent Life I
A Proposed Origin Of Life On Earth:
adapted from Biology, 2015, tenth edition, pp. 439-446
I) chemistry:
a)inorganic (ionic) minerals,
dissolved in
b) water,
plus
c)dissolved gases
of the early atmosphere:
CO2 (carbon dioxide)
CO(carbon monoxide
HOH (water) vapor
N2 (nitrogen gas)
NH3 (ammonia)
H2S (hydrogen sulfide gas)
CH4 (methane gas)
plus
II) energy:
a)lightning;
b)cosmic (UV) radiation
plus
III) absence of free O2
(oxygen oxidizes - ties up/combines with - essential component ions into "oxides")
plus
IV) time (in millions of years)
-sugars
-nucleotide bases of RNA + DNA
-amino acids
-ATP:adenosine triphosphate
(also a nucleotide base)
-lipids
yields:
simple organic molecules (organic monomers):
you start with