Which substance should a student apply to the skin if he or she gets splashed with an acid?

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

Why did southern business leaders want to increase the number of slaves

Can someone me with 6 to 10 plz this is for masteries test.