This table shows how the number of kingdoms has changed with each major scientist.

Which number belongs in the space labeled X?

2
3
5
6

Which is one example of a phenotypic change that is not genetic

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

Me the formula cacl2 represents the compound