Evolution
4th Edition
ISBN: 9781605356051
Author: Douglas Futuyma, Mark Kirkpatrick
Publisher: SINAUER
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Chapter 1, Problem 5PDT
Summary Introduction
To explain: The contrasting points of Darwin’s ideas of the origin of species with the prevailing notions of that time.
Introduction: Before Darwin, it was Lamarck’s theory that was most accepted in explaining the evolution of organisms. Theory of evolution given by Lamarck and Darwin explained almost the same basic things, but Lamarck’s theory of evolution lacked certain scientific basis of explanation that made Darwin’s theory more acceptable at that time. Darwin emphasized more on common ancestry, whereas Lamarck’s theory did not give any importance to ancestry.
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The two revolutionary hypotheses proposed by Darwin in On the Origin of Species were descent with modification and natural selection as the main mechanism of evolution. How did Darwin’s ideas contrast with the prevailing notions of the origins of species at the time?
What was missing in Darwin’s explanation of evolution by natural selection? How does the modern synthesis fill this gap?
How is the observation of “sporting mutations” in animal breeding used to challenge Darwin’s theory of gradualism? Why did Darwin reject such mutations as having little evolutionary importance?
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