Download Evolution WebQuest - Mrs. pickard`s science website

Name
Date
Period
Evolution WebQuest
Part A: Learn about the basics of evolution at http://evolution.berkeley.edu/evolibrary/article/evo_14
1. What is evolution and what is it responsible for?
2. Click next. When does evolution take place?
3. Only inherited
differences that can be passed on are acted upon by evolution.
4. Compare the two examples of changes in beetle populations. Which of the two scenarios is an example of
evolution? Defend your answer with an explanation.
5. Click next. Identify and describe the four basic mechanisms for evolutionary change.
Mechanism
Description
6. Genetic drift and natural selection only take place if there is
.
7. What are the three sources of genetic variation?
a.
b.
c.Sex aka
8. Click next several times to read about mutations. Now complete the paragraph below regarding gene flow.
Gene flow, also called
, is any movement of
to another. Gene flow includes lots of different kinds of events, such as
new destination or people moving to new cities or countries. If
those genes previously did not
,
genetic
. In the graphic on the website, the gene for
from one population to another.
from one
being blown to a
are carried to a population where
can be a very important source of
coloration moves
9. Click next and read until you get to Genetic Drift. Summarize the idea behind genetic drift.
10. Click next. Natural selection is the most important mechanism behind evolution. This webpage gives you an
example of natural selection involving beetles. Read the descriptions and look at the cartoons. Explain what
has happened to this population of beetles, using the following terms: Adaptation, Survive, Reproduce, Gene,
Natural Selection, Species, and Evolution.
11. How do the finches of the Galapagos Islands demonstrate evolution?
12. Click next. Fitness does not necessarily mean “strongest.” Defend this statement.
Part B: Have some fun at http://science.discovery.com/interactives/literacy/darwin/darwin.html.
1. Click to learn about Natural Selection. What does “survival of the fittest” mean?
2. Now play Darwin’s survival game. How would you describe your starting environment? What kinds of
landforms are present? What kind of vegetation is there? Anything else that is noteworthy?
3. Draw your 3 starting variants of your species and describe why you chose the ones that you did in the table
below. What advantages did you think they might have over some of the other options?
Trial #1
Picture of variant
1.
Reason for choice
2.
3.
How long did your species survive?
4. Repeat the above, choosing a new starting population if necessary, until you make it to 1,000,000
years!! What adaptations helped your species to survive over one million years?
5. Once your species has survived 1,000,000 take the quiz and write the letter to the correct responses:
1.
5.
9.
2.
6.
10.
3.
7.
4.
8.
.Part C: Natural Selection may occur in several ways. Learn about the patterns of Natural Selection through the
tutorial at http://wps.pearsoncustom.com/wps/media/objects/3014/3087289/Web_Tutorials/17_A02.swf .
1) If you have headphones, you may plug them in. Otherwise, press “play” and read the text silently to
yourself. Describe the situation from the tutorial that led to directional selection.
2) In which scenario did you have selection against the mean (disruptive selection)?
3) How is the natural selection of lizards an example of stabilizing selection?
Part D: Explore evolution in action at http://www.techapps.net/interactives/pepperMoths.swf
1.) Click and read about the Peppered Moth’s life cycle. Briefly describe the looks of a peppered moth.
2.) Prior to the early 1800’s, most peppered moths were light in color. Describe the impact of the British
Industrial Revolution on the peppered moth population.
3.) Click and read about Dr. Kettlewell’s testing the natural selection of peppered moths. What were his
four hypotheses that guided his experiments?
4.) In terms of natural selection, what did Dr. Kettlewell conclude?
5.) Click and read about the Bird’s Eye simulation. Click on the light colored forest. Eat as many moths as
you can in 60 seconds. Identify the final population percentages.
% Light Peppered Moths
% Dark Peppered Moths
Explain your results.
6.) Go back to the Bird’s Eye and click on the dark colored forest. Eat as many moths as possible.
% Light Peppered Moths
Explain your results.
% Dark Peppered Moths
Part E: Learn about speciation with the images at http://evolution.berkeley.edu/evolibrary/article/evo_42
1) What is speciation?
2) Genetic changes over many years have resulted in two separate fruit fly images. Draw and describe the
scenario which explains how this might have happened.
The scene:
Disaster strikes:
The populations diverge:
So we meet again:
3) This is a simplified model of speciation by
.