Compared to the Old World, domestication in the New World is characterized by a.
a heavier reliance on animal species.

b.
earlier beginning dates.

c.
the use of a greater variety of plants.

d.
its ultimate derivation from Old World centers.

e.
all of the above

the backbone of the dna and rna compound is sugar phosphate.

light dependent reactions:

light independent reactions:

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it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.