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Exam 3 Chapters 11, 12 and 13

Exam 3 Chapters 11, 12 and 13

Q Question 1 3 / 4 pts Darwin noted that the process of natural selection is the driving force of evolution. It results in and allows for the organism to be better suited for its environment than the previous generation. What are the two key concepts that drive the process of natural selection? Question 2 2 / 2 pts Why isn't natural selection perfect? Question 3 7 / 8 pts In the space provided, write whether the concept on the left relates to macroevolution or microevolution. Question 4 2 / 2 pts List two causes of microevolution. Question 5 2 / 3 pts Where do new sources of alleles come from to add to gene pool variance?

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Your Answer: The two key concepts that drive the process of natural selection are: 1. Variation: Individual variation in an organism's appearance and behavior may be seen in populations of organisms. Body size, hair color, facial features, voice characteristics, and the number of kids are only a few examples of these variances. However, certain characteristics exhibit little or no individual variation. 2. inheritance: Certain characteristics are regularly inherited from parents to children. These qualities are heritable, as opposed to other features that are weakly heritable and are heavily impacted by environmental factors.