Early organisms in the Precambrian era converted to oxygen. O A. water vapor
O B. nitrogen
O c. carbon dioxide
D. sulfur dioxide

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.

Factors that can increase mutation rates a. high temps b. low temps c. food additives d. uv rays

To be or not to be that is da question