2. Order the following atoms and or ions based on increasing atomic size.
Fe^+2
Fe
Fe^+3

The length of a vector arrow represents its magnitude and the point represents its direction true or false apex

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

Compare and contrast physical changes with chemical changes.