Cladograms

Cladograms

I can identify, describe, and use a cladogram to determine evolutionary relationships.

Multiple Choice

This is a picture of

• a family tree

• a cladogram

• a gel electrophoresis analysis printout

Cladograms are used to

* show relationships among organisms

* help us determine common ancestors

Multiple Choice

True or False: I can determine the lion's closest relative on this cladogram

• True

• False

Cladograms have nodes.

• The node will show where a common ancestor occurred

• The more nodes two organisms have in common, the more closely related they are

Multiple Choice

On this cladogram, the lion and the brown bear have __ common ancestors.

• 1

• 2

• 3

• 4

Sometimes cladograms have characteristics listed on them. Organisms that come after the trait have the trait.

• According to this cladogram, only house cats have the ability to purr

• Brown bears do not have retractable claws

Multiple Choice

Which organism does NOT have a placenta?

• Lion

• House cat

• Brown bear

• Platypus