Download Log on, go to the internet and go to http://evolution

Log on, go to the internet and go to http://evolution.berkeley.edu
Click on What is evolution and how does it work? Then click on Mechanisms of Evolution
At the end of each page, click NEXT. Continue till the end of the section
MECHANISMS OF EVOLUTION:
Descent
In the example given, why are more brown beetles being born than green beetles?
Mechanisms of Change
Explain how each of the following causes change in a population:
 Mutation

Migration

Genetic Drift

Natural Selection
Genetic Variation
Name three processes that cause genetic variation and explain how they work.
Genetic Drift
Define genetic drift and explain how it differs from natural selection
Natural Selection
Explain the process of natural selection. Give examples.
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Compare and contrast sexual selection and artificial selection with natural selection
Coevolution
Define Coevolution. Give an example, explaining how it demonstrates coevolution.
Microevolution
What level of group does microevolution focus on?
How do we detect and study microevolution?
List and explain 4 ways that microevolution can occur:
Speciation
Define species
Define the process of speciation and explain how speciation can occur.
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Isolation
Distinguish between geographic isolation and reproductive isolation. Explain why isolation is
important to speciation.
Evidence for speciation
Explain how the owl populations were isolated.
Describe the experiment with fruit flies and explain how it demonstrates both geographic and
reproductive isolation,
Macroevolution
How is macroevolution different from microevolution?
Describe the general pattern of macroevolution.
The pace of evolution
What are “transitional forms” and what do they tell us about the pace of evolution?
Explain “adaptive radiation”
Trends in Evolution
Why does the “tree” represent evolution patterns better than the “ladder”?
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Log on, go to the internet and go to http://evolution.berkeley.edu Click on What is the evidence
for evolution? Under the Sub-topics section, note 2 links: Homology and Analogy and
Observations of Evolution click on Homology and Analogy and work through those sections.
WHAT IS THE EVIDENCE FOR EVOLUTION
Homology and Analogy
Explain the difference between homology and analogy
How are tetrapod limbs similar?
What do homologous structures suggest about ancestry?
Why might unrelated organisms have similar body parts?
Do you think the similarity in body shape between sharks and dolphins is a homology or an analogy?
Why?
How about the “wings” of sugar gliders and flying squirrels? (homologous or analogous) Explain.
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