Which mineral is never found freely in nature but is extracted from a chemical compound

What adaptation is apparent in the bodies of the three tortoise species shown in figure 16-2

What is true of all organisms in the kingdoms protista, plantae, fungi, and animalia? a. they are multi-celled. b. they are photosynthetic. c. they have cells that contain membrane-bound organelles. d. they contain cells that lack membrane-bound organelles.

Long-period comets come from the oort cloud particles in earth’s atmosphere material from the asteroid belt the kuiper belt