Electrostatic paint what kind of property does a colloid use?

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

What is the formula that this ionic compounds could form sr2+p3-o2-

Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.