Most of the concentration of which gas results from the activity of producer organisms?

Explain how organisms could be harmed by high levels of salt from roadways?

Study the picture of the ocean. which is the best example of an organism’s niche shown in the picture? a. the environment contains several of the same species of coral. b. the shallow area of the ocean meets the needs of the coral and the fish. c. the ocean has fish and coral that live in the same area. d. the coral take in food from the water and provide shelter for the fish.

Ascientific idea becomes valid when it is what?