Ascientist studied four fossils of a marine mammal dating back to 50 million years, 45 million years, 40 million years, and 30 million years ago. which fossil is most similar to the present-day mammal?

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

The wings of insects, birds, and bats evolved independently but carry out similar functions. this is an example of a. analogous structures. b. embryonic structures. c. vestigial structures. d. homologous structures.