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Ch. 22 - Descent with Modification: A Darwininan View of Life
All textbooksCampbell 11th EditionCh. 22 - Descent with Modification: A Darwininan View of LifeProblem 1
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Chapter 22, Problem 1

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.

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Hello everyone here We have a question asking us which of the following statements about natural selection is true. A individual with adaptive traits are more likely to survive and reproduce. This is true. B carrying capacity will not affect its increasing inhabitants. This is not true, carrying capacity will affect its increasing inhabitants. D all traits from the ancestor will be inherited endlessly by all of its descendants. This is untrue. They will adapt and they will carry the traits that are more beneficial. D only animals with huge body sizes can survive. This is untrue. So our answer is a individuals with adaptive traits are more likely to survive and reproduce. Thank you for watching. Bye.
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Textbook Question

Which of the following observations helped Darwin shape his concept of descent with modification? a. Species diversity declines farther from the equator. b. Fewer species live on islands than on the nearest continents. c. Birds live on islands located farther from the mainland than the birds' maximum nonstop flight distance. d. South American temperate plants are more similar to the tropical plants of South America than to the temperate plants of Europe.

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Textbook Question

Within six months of effectively using methicillin to treat S. aureus infections in a community, all new S. aureus infections were caused by MRSA. How can this best be explained? a. A patient must have become infected with MRSA from another community. b. In response to the drug, S. aureus began making drug- resistant versions of the protein targeted by the drug. c. Some drug-resistant bacteria were present at the start of treatment, and natural selection increased their frequency. d. S. aureus evolved to resist vaccines.

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Textbook Question

The upper forelimbs of humans and bats have fairly similar skeletal structures, whereas the corresponding bones in whales have very different shapes and proportions. However, genetic data suggest that all three kinds of organisms diverged from a common ancestor at about the same time. Which of the following is the most likely explanation for these data? a. Forelimb evolution was adaptive in people and bats, but not in whales. b. Natural selection in an aquatic environment resulted in significant changes to whale forelimb anatomy. c. Genes mutate faster in whales than in humans or bats. d. Whales are not properly classified as mammals.

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