it is therefore hard to see how polymerazation [it is needed to form big molecules]could have proceeded in the aqueous environment of the primative ocean since the presence of water favors depolymerazation rather tha polymerazation.
I would imagine that this was written before it was known that carbonyl sulfide, a gas emitted by volcanos, catalyzes the polymerization of amino acids in water. (Leman,
et al., Science vol 306, pp 283-286 2004). And maybe before, or in ignorance of, hypotheses about early amino acid polymerization happening on occasionally-wet rocks or inside lipid droplets.
And please, traste, put a space after punctuation marks. It will make your writing much easier to read. You won't waste any paper, either - just space on a screen.