When gases move from an area of higher concentration to an area of lower concentration, it is known as

The organelle pictured is found in cells of and is theorized to have once been an independent organism.

The many stone tools, fragmentary animal bones, and teeth found at gran dolina, spain, indicate that hominids there? a. processed and consumed animals and other hominids. b. did not differ appreciably from earlier asian homo erectus. c. were similar to later homo sapiens. d. none of the above

Explain why it’s important for scientists to study the sun. list at least two challenges researchers face when examining earth’s nearest star.