Name two index fossils. Why are these fossils important to the practice of relative aging? PLS ANSWER ASAP!

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 mass of 8 moles of sodium atoms

What are four significant sources of ghgs that come from wostem washington?