Index fossils are a. fossils that are found in limestone. b. relatively rare and difficult to find. c. imprints of organisms known to have lived during a specific time period. d. fossils of species that still exist today.

What are two ways in which waves erode the land?

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.

Which of the following statements most accurately describes convergent evolution? the process in which two similar species evolve separately from each other and share similar characteristics the process in which a single species evolves into two or more new species the process in which two entirely different species evolve in response to each other the process in which two different species evolve separately from each other but still share similar characteristics