draw a flowchart to show how the collapse of the forest ecosystem on easter island affected the human population that lived there.

Which of the following is not a main characteristic that scientists focus on when determining which kingdom an organism belongs to

Match the pollutants. 1. a chlorofluorocarbon smoke 2. a biodegradable organophosphate insecticide freon 3. particle pollution paint 4. hazardous waste monoxide 5. carbon is completely burned malathion 6. carbon is incompletely burned dioxide

Which kind of mutation has occurred when the codon for an amino acid is changed to a stop codon? a. a silent mutation b. a missense mutation c. a frameshift mutation d. a nonsense mutation