How are bat forelimbs different from other mammals' forelimbs? A: There are more bones.
B: The bones in the digits are longer.
C: Bats lack a thumb.
D: The wrist is more mobile.

Which of the following statements best distinguishes a hypothesis from a theory? a. theories are hypotheses that have been proved. b.hypotheses are guesses; theories are correct answers c. hypotheses usually are relatively narrow in scope; theories have broad explanatory power. d. theories are proved to be true; hypotheses are often contradicted by experimental results.