Select the correct answer. A kilogram is an SI unit. Which quantity might you measure in kilograms?

1. temperature
2. electric current
3. length
4. mass

What role do traits play in affecting an organisms ability to reproduce? finches

Place the steps tor the formation of the enzyme pepsinogen in correct order

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