Biology (MindTap Course List)
Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 18, Problem 14TYU

EVOLUTION LINK Write short paragraphs explaining each of the following statements:

(a) Natural selection chooses from among the individuals in a population those most suited to current environmental conditions. It does not guarantee survival under future conditions.

(b) Individuals do not evolve, but populations do.

(c) The organisms that exist today do so because their ancestors had traits that allowed them and their offspring to thrive.

(d) At the molecular level, evolution can take place by the replacement of one nucleotide by another.

(e) Evolution is said to have occurred within a population when measurable genetic changes are detected.

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1 - Consider natural selection and biocultural evolution. Why do you think anatomically modern humans were more reproductively successful than other contemporary hominins? Or were they? 2 - Why do you think such a small portion of Neandertal or Denisovan DNA exists in the gene pool of modern humans? Why not more? 3 - How might have anatomically modern humans avoided waiting tens of thousands of years for advantageous mutations to pop up that would allow them to adapt to all of these new environments they encountered as they dispersed across the Old World? What might have been a faster way for them to adapt to these environments that the groups who were already in the region had already adapted to? 4 - How does admixture between different regionally adapted populations increase a species chances of survival? 5 - How might the removal of a regionally adapted population make a species more susceptible to extinction?

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