Which of the following is NOT part of the appendicular skeleton? A) forearm
B) pectoral girdle
C) pelvic girdle
D) foot
E) ribs

People who exercise for an hour may have lower cholesterol levels. is that a statement? a law? or a hypothesis?

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

How are fossils used to date organisms?