Name:______and ______
CLADOGRAMS
http://www.ucmp.berkeley.edu/education/explorations/tours/Trex/index.html
Click- Folder One and then click OPEN
1. All living things that exist today and ______are the result of millions of years of evolution.
Click on the diagram to learn more about the organisms that are part of each group. Fill in the table below.
2. As you look at James and Frances family, what happens to the resemblance in the family as more generations are produced?
3. Would you expect the fifth generation of an organism to look exactly like the first generation?
4. In a branching diagram (cladogram), the common ancestor would be found at the ______.
5. Life is very diverse, yet all living things are ______.
6. Branching diagrams show ______.
Make sure you understand how to read the branching diagram (cladogram) for each of the following:
· Each has its own distinct history
· They also share a part of their history
· Somewhere back in time they shared a common ancestor
7. Define: vertebrate
8. Cladograms represent hypotheses about______—who is more closely related to whom.
9. The relationships are based on shared features that ______
______.
10. Studying cladograms can give scientists clues about ______.
Analyzing a Cladogram
Examine the sample cladogram, each letter on the diagram points to a derived character, or something different (or newer) than what was seen in previous groups. Match the letter to its character.
1. ______Wings
2. ______6 Legs
3. ______Segmented Body
4. ______Double set of wings
5. ______Jumping Legs
6. ______Crushing mouthparts
7. ______Legs
8. ______Curly Antennae
Create a Cladogram
PROCEDURE:
1. IDENTIFY THE ORGANISM IN THE TABLE THAT IS LEAST CLOSELY RELATED TO EACH OTHERS.
2. USE THE INFORMATION IN THE TABLE TO CONSTRUCT A CLADOGRAM OF THESE ANIMALS.
TABLE:
ORGANISM / DERIVED CHARACTER (traits)BACKBONE / LEGS / HAIR
EARTHWORM / ABSENT / ABSENT / ABSENT
TROUT / PRESENT / ABSENT / ABSENT
LIZARD / PRESENT / PRESENT / ABSENT
HUMAN / PRESENT / PRESENT / PRESENT
CLADOGRAM