Which best describes singing behavior in birds? singing is learned; the species song is innate. singing is innate; the species song is learned. all singing is innate. all songs are learned.

What are the most explosive events that occur on the sun? umbras solar flares solar winds prominences

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

Ascientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas which group of statements best describes all of the materials he is using in the investigation?