Baby albino crocodile, Tall giraffe, Cactus, A desert. Which one doesn't belong?

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

Structure of the atoms: discovery of the nucleus in 1909i need answering all of these questions

What is the compound name for the formula [ru(en)2cl2]2+ and [co(en)cl2br]-