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 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.