Evolutionary Relationships

shared common ancestor

Evolutionary Relationships

​https://play.blooket.com/play

Open Ended

What is a family tree?

We Will...

Examine Cladograms and Phylogenetic Trees and how they link organisms to common ancestors

1. Modern taxonomists consider the phylogeny of an organism when attempting to classify it

​

Phylogenetic Trees

2. Phylogeny is: the evolutionary relationship between organisms

​

Phylogenetic Trees

3. To show the evolutionary relationship between different groups of organisms, scientists construct phylogenetic trees

​

Phylogenetic Trees

4. A phylogenetic tree is a family tree that shows: evolutionary relationship thought to exist among different organisms

​

Phylogenetic Trees

the phylogenetic tree to the right shows a few of the phyla of the Animal Kingdom

Phylogenetic Trees

Open Ended

What is the common ancestor of all organisms shown on this tree?

Open Ended

Are the Cnidarians more closely related to the sponges or to the comb jellies (Ctenophores)?

Open Ended

What is the closest relative to the Rotifers?

Open Ended

What does a branch point represent?

We Will...

Examine Cladograms and Phylogenetic Trees and how they link organisms to common ancestors

A. Cladistics is a relatively new method of: establishing evolutionary relationships

​

Cladograms

B. Cladistics uses features called "Shared Derived Characteristics" to establish evolutionary relationships

​

Cladograms

C. A "derived character" is a feature that: evolved only within the group under consideration

​

Cladograms

D. An example might be the feathers of birds. Birds are the only animals to have feathers. It is therefore assumed that feathers evolved within the bird group and were not inherited from a distant ancestor

​

Cladograms

E. Shared derived characters are strong evidence of evolutionary relationships between the organisms that share them.

​

Cladograms

​G. Cladogram - What are the "derived characters" shown in this cladogram

Open Ended

Which group on the cladogram arose first?

Open Ended

Do Amphibians have an amniote egg?

Open Ended

Do turtles have an amniote egg?

Open Ended

Which two groups on the cladogram seem to be most closely related?

Open Ended

List the groups that have hair.

Open Ended

List the groups that give live birth to their young.

Open Ended

What are the derived characters of the monotremes?

Open Ended

Which two groups have the most shared derived characters?

We Will...

Examine Cladograms and Phylogenetic Trees and how they link organisms to common ancestors