Earth has three main climate zones because of the differences in latitude and?

Describe speciation of the galapagos island finches in terms of geographic isolation

List the advantages and disadavantages of the switch from persistent chlorinated hydrocarbon pesticides (such as ddt) to nonpersistent organophosphate pesicides. have the benefits of the switch outweighed the disadvantages? explain.

20 the compound al(nh3)2 has atoms of nitrogen.