Explain how genetic drift results in evolution. Give two specific examples of natural selection. Explain how environmental changes triggered a change in your examples.
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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.