What can crystalize size tell us about where an igneous rock formed?

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

Which best describes why nh4+ can form an ionic bond with ci-?

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?