Choose all that apply. a mesa:

is a dome-shaped hill that has been eroded
is a flat-topped hill that has been eroded
originated as a plateau
originated as a mountain
originated as a volcano

Which revelation resulted from the observation of the spectrum of different galaxies? a. there were more galaxies whose spectrum was blueshifted b. there were no galaxies whose spectrum was redshifted c. there were more galaxies whose spectrum was redshifted d. there were no galaxies whose spectrum was blueshifted