The distance versus time graph for Object A and Object B are shown. Which statement best describes the motion of Object A and Object B?

A. Both objects move with variable speed.
B. Both objects move with constant speed.
C. Object A moves with constant speed and Object B moves with variable speed.
D. Object A moves with variable speed and Object B moves with constant speed.

How do the energy differences between the higher energy levels of an atom compare with the energy difference between the lower energy level of the atom

This is a mixture that has the same composition throughout.

Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? a. the wings are analogous structures that evolved differently and do not have a similar internal structure. b. the wings are homologous structures that evolved differently and do not have a similar internal structure. c. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. d. wings of bats are vestigial structures, but the wing structures of birds are not vestigial