Check What You Know Cladogram and Phylogeny

What characteristic do all the organisms on this cladogram share?

• Being bi-pedal & having language

• Complex brains

• Fully binocular vision

• Partial binocular vision & opposable thumbs

Which two living organisms are most closely related?

• A and B

• B and C

• C and D

• B and D

• A and D

Answer explanation

B and C share the most recent common ancestor, F.

You look at two species and see very similar amino acid sequences. What does this likely tell you?

• These are the same animal.

• These animals have a common ancestor.

• These animals are not likely related.

• These animals are likely becoming one species.

At which point do you located the common ancestor to the alligator and T. Rex?

• Point A

• Point B

• Point C

• Point D

Which trait should go where A is on the cladogram?

• eyes

• feet

• lips

• hat

What number is the common ancestor of C and D

• 1

• 2

• 3

• 4

According to the cladogram, which organism is most distantly related to the human?

• crayfish

• rat

• perch

• frog

What separates rodents and primates from crocodiles on this cladogram?

• Bony Skeleton

• Vertebrae

• Eggs with shells and hair

• Four Limbs

Which location on the phylogenic tree identifies characteristics shared by species B,C,D,E,F

• Location 1

• Location 2

• Location 3

• Location 4

Which of the following traits evolved most recently?

• Amniotic egg

• Walking legs

• Jaws

• Hair