Quiz

1. The four animals show changes in limb shape and size over time, indicating that the Basilosaurus evolved from a Mesonychid.
2. Australia
3.Dragonflies, birds, bats are examples of convergent evolution. The three animals all have wings, but the underlying structure of those wings are completely different. The feature just evolved out of necessity for all animals.
4. DNA sequences reveal the amount of genetic coding different animals have in common with each other. Primates and humans only differ in genetic makeup by a 0.5 -1.0% difference.
5. Homology refers to similarities between animals. For example, horses and donkeys have genetic coding for cytochrome C so similar that they are homologous for all but 1 amino acid in the selection we examined in class. Whales and other mammals have homologous limb structures, just that taaktalik the fish with feet had homologous structures with humans and other wrist-ed creatures.