21. Evolution
Introduction to Evolution and Natural Selection
21. Evolution
Introduction to Evolution and Natural Selection
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- Multiple ChoiceDarwin originally defined evolution as __________.1066views
- Multiple ChoiceWhich of the following is a key observation that must be explained in a unifying theory about life?787views
- Multiple ChoiceThe scala naturae, or scale of nature, is based on the ideas of __________.1116views1rank
- Multiple ChoiceAt the time Darwin voyaged on HMS Beagle, the popularly accepted theory in Western culture that explained the origin of Earth's plants and animals held that the various species __________.937views
- Textbook QuestionWhat observations did Darwin make on the Galápagos Islands that helped convince him that evolution occurs? a. the existence of animals that did not fit into Linnaeus's classification system; b. the similarities and differences among cacti and tortoises on the different islands; c. the presence of species he had seen on other tropical islands far from the Galápagos; d. the radioactive age of the rocks of the islands; e. fossils of human ancestors2366views
- Textbook Question
Which of the following is an observation or inference on which natural selection is based? (A) Individuals do not vary in their heritable characteristics. (B) Only well-adapted individuals produce offspring. (C) Species produce more offspring than the environment can support. (D) Nearly all of each individual's offspring will survive and reproduce.
1895views - Textbook Question
Which of the following is not an observation or inference on which natural selection is based? a. There is heritable variation among individuals. b. Poorly adapted individuals never produce offspring. c. Species produce more offspring than the environment can support. d. Only a fraction of an individual's offspring may survive.
1177views - Textbook QuestionSummarize the key points of Darwin's theory of descent with modification, including his proposed mechanism of evolution.1011views