bio94acFinal - Lecture 1 The origin of life Origin of Life...

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Lecture 1 The origin of life
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Origin of Life Sample question: The Hadean Era was characterized by: a.) the first multicellular life b.) violent, molten rock c.) an abundance of free oxygen d.) a. and c. e.) b. and c.
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Four requirements Abiotic synthesis of complex molecules Lipid biosynthesis. Polymers Protobiont formation Heriditary material Oxygenated environment Which four of these are needed for the origin of life?
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Lecture 2 Evolutionary theory
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Natural Selection Sample question: 2 Which of these statements about natural selection is false? a.) Individuals of the same species probably have similar reproductive success. b.) Overproduction of offspring allows selection to take place. c.) Speciation happens very gradually d.) Individuals of the same species can vary significantly e.) None of the above are false.
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Lecture 3 Evolutionary processes
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Biston betularia “Normal” Form Melanic Form
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Natural Selection Sample question: 2 Which of these is true of the above population if a sample from the same population one year ago resembled a normal bell-shaped curve? a.) It consists of two separate species. b.) It is an example of convergent evolution. c.) It could be undergoing disruptive selection. d.) It could be undergoing directional selection. e.) None of the above are applicable. Number of individuals Height (cm)
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Lecture 4 Natural selection
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Sexual Selection Sample question: 2 Sexual selection causes which of the following? a.) female choice. b.) male competition. c.) sexual dimorphism. d.) A and B. e.) A, B, and C.
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Mutations Are these statements each true or false? 1. Mutations always result in adaptations. 2. Mutations are life’s method of adapting to given situations. 3. Mutations are often detrimental to an organism.
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Genetic Drift and Gene Flow Genetic drift is purely the result of _________ _______. Oh noes! Earthquake! A long time later… Gene flow makes species _______ __________ over time.
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Lecture 5 Speciation
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Biological Species Concept A species is a population of individuals that can ______ and produce ________ __________. What is a species? ?! ? ?
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Barriers to reproduction Type 1. _______________ example: Type 2. _______________ example: Type 3. _______________ example: Type 4. ________________ example: You should be able to name all four types of pre-zygotic barriers and think of an example of each one.
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Barriers to reproduction 1. _______ ___________. 2. _______ ______________. Know the two types of postzygotic barriers to reproduction.
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Two possible types of speciation: Speciation due to a geographic barrier is __________ ___________. Speciation without physical separation is __________ ____________.
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bio94acFinal - Lecture 1 The origin of life Origin of Life...

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