How does changes in population size affect an ecosystem?

Where is energy trapped inside the organelle chlorophyll

In dna, only the_ varies from one nucleotide to another. base phosphate sugar amino acid

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.