How are messages sent in the nervous system

Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? the wings are analogous structures that evolved differently and do not have a similar internal structure. the wings are homologous structures that evolved differently and do not have a similar internal structure. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. wings of bats are vestigial structures, but the wing structures of birds are not vestigial.

In attempt to solve the working problems created by the industrial revolution, the united states and many countries in europe considered and/or adopted

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.