Do Now 3/5 8LS4.2

Which piece of evidence could be used to show that mammalodons and modern whales are directly related to each other and share a common ancestor?

• They both eat small sea creatures

• They share similar anatomical features, such as unused hip bones.

• They both produce one baby at a time.

• Their social behavior includes swiming in groups.

Which of the following statements ​best​ describes how the fossil record shows evidence for evolution?

• The fossil record shows the remains or traces of ancient life forms

• Fossils exist all over the world

• When an animal dies, its body can be covered up and preserved by layers of rock and earth, forming a fossil

• By studying, dating, and analyzing fossils, we can learn how living creatures changed over time

Similar structures with different purposes found in different species are known as _____

• vestigial structures

• DNA

• homologous structures

• the fossil record

The diagram provided is a phylogenetic tree. It shows how groups of organisms are related through a shared evolutionary history. The fossil's remains of a creature that is the common ancestor of amphibians, primates, rodents, crocodiles, and birds is discovered. This fossil represents an organism represented by which labeled location on the diagram?

• A

• B

• C

• D

Lily is comparing the bones of the forelimbs (wing or arm) of three animals. An illustration of the three is shown. Even though birds and bats both have wings, the skeletal structure is more similar between bats and humans. What is the most reasonable conclusion that can be drawn from these observations?

• Birds and bats are closely related to each other, while humans are unrelated to both.

• The common ancestor of birds and bats must have had wings and flown.

• Humans live in habitats very different from the habitats of both birds and bats.

• Humans and bats share a closer evolutionary history with each other than with birds.