Download PRENTICE HALL- ONLINE ACTIVITY 14

PRENTICE HALL- ONLINE ACTIVITY 14.2
EVOLUTION HAS LEFT MUCH EVIDENCE
NAME _________________________________
PERIOD________________________________
OBJECTIVE: to examine the similarities in homologous structures.
1. Give an example of a homologous structure.
2. How do the limbs of the human, cat, whale, and bat compare to each other?
3. What are their similarities?
4. What are their differences?
5. How do scientists use homologous structure information?
6. Explain how these homologous structures suggest a common ancestor.
7. If the human, cat, whale, and bat did not have a common ancestor, how likely is it that these
four species would possess the same basic forelimb bone structure?
8. What other methods do scientists use to study the evolutionary ancestry of species?
9. What protein are you testing in this activity?
10. Describe Cytochrome c.
11. In the box below, write the amino acids that each animal has in common with humans.
Human
Chicken
Frog
Rhesus Monkey
Mouse
0
12. What is our closest biological relative in this simulation?
13. Which animal is the least related to humans?
14. Describe the protein hemoglobin.
15. How do the number of amino acids that differ from human hemoglobin compare to the
number of amino acids that differ from Cytochrome c compare to one another?
16. Which one of the four species do the cytochrome c data suggest is most closely related to
humans? The hemoglobin data?
17. Which one of the four species do the cytochrome c data suggest is least related to humans?
The hemoglobin data?
18. Explain why amino acid sequence data are useful for inferring evolutionary relatedness.