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• Explain how genetic drift results in evolution.
• Give two specific examples of natural selection.
Explain how environmental changes triggered a
change in your examples.
• A scientist found two populations of very similar
organisms. Design an experiment to determine
if these populations belong to the same species
or not. Determine the variables.
• Explain how molecular evidence supports the
concept of evolution.
• Design a plan to investigate the claim that
speciation occurred throughout the history of
life on Earth.
• Differentiate between allopatric and sympatric
speciation. Describe a specific example of each.
• The Galapagos Islands consist of a dozen islands
close to each other. Each island has 1-11 of the
13 species of finches on it. Many biologists
believe that if there would be only 1 island,
there would be only 1 finch species.
– How does the existence of the islands promote
speciation? Explain
– Is the mode of speciation that occurred on the
islands more likely have been allopatric or
sympatric? Explain
• CO2 levels in Earth’s atmosphere have increased by
about 40% since 1850. On a geologic time scale,
that’s a dramatic change over a very short time.
What were the effects of the oxygen revolution
about 2.5 billion years ago? How might those
relate to today’s problems with increasing CO2 in
Earth’s atmosphere?
• List two pieces of evidence that suggests that fish
and humans have a common ancestor. Explain
these.
• Describe speciation in an isolated population and
connect it to change in gene frequency, change in
environment, natural selection and/or genetic drift.
• Describe a specific hypothesis about the origin
of organic molecules, macromolecules and cells
on earth. Give at least one supporting evidence
of each.
• Why do you think it is necessary to revise
hypotheses about the history of life all the
time?
• Describe the conditions of the early earth.
Provide evidence.
• Analyze the sources and consequences of O2
release into the atmosphere.