Which naturally occurring gas can be found in certain rocks and soils and is considered a hazardous air pollutant? mercury

carbon dioxide

radon

argon

Abiologist counts the number of rabbits in a population each year and observes a decrease in population. since the coyote population has exploded, the biologist concludes that the coyote population has had a negative interaction with the rabbit population. which describes the biologist’s actions? a.) experimentationb.) inferencec.) observationd.) interacting

Which fossil organism in whale evolution do you think was the first to live mostly in water? explain your claim with evidence and reasoning?

In order for you to hold your breath, your nervous system must send messages to your a. respiratory system b. digestive system c. heart in your cardiovascular system d. check in your muscular system