As energy flows through ecosystems, atoms and molecules cycle among what?

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.

Can a trait be both polygenic and have multiple alleles? explain why or why not.

Is this mrna or rna need need the answer in a hurry