Which region experiences only two different climates? Midwest, Northeast, Southwest, & Pacific

Which evidence is most likely used to indicate the beginning of solar system formation? a. materials combined to form a mass. b. materials were pulled together by gravity. c. water condensed and collected to form oceans. d. different species of microorganisms lived on earth.

In the following diagram, four different index fossils are labeled: which of the labeled fossils comes from the oldest organism? a b c d

Which of the following insects is a decomposer? a. mosquito. b. caterpillar. c. beetle. d. none of the above.