Campbell Essential Biology with Physiology (6th Edition)
Campbell Essential Biology with Physiology (6th Edition)
6th Edition
ISBN: 9780134711751
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece
Publisher: PEARSON
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Chapter 14, Problem 16BS
Summary Introduction

To explain: Some people think that the endangered status of the red wolf should be withdrawn and resources should not be spent to protect what is not a “pure” species as it is a fertile hybrid species of red wolf and coyotes. Whether an individual would agree with this or not.

Introduction: The endangered species is a species whose number have fallen to a critically low level and are likely facing the threat of extinction. The extinction of the species occurs due to loss of habitat and due to loss of genetic variation.

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In the United States, the rare red wolf (Canis lupus) has been known to hybridize with coyotes (Canis latrans), which are much more numerous. Although red wolves and coyotes differ in terms of morphology, DNA, and behavior, genetic evidence suggests that living red wolf individuals are actually hybrids. Red wolves are designated as an endangered species and hence receive legal protection under the Endangered Species Act. Some people think that their endangered status should be withdrawn because the remaining red wolves are hybrids, not members of a "pure" species. Do you agree? Why or why not?
Distinct species that are able to interbreed in nature are said to “hybridize,” and their offspring are called “hybrids.” The gray oak and the Gambel oak can mate to produce fertile hybrids in regions where they co-occur. However, the gene flow in nature is sufficiently limited that, overall, the two species remain phenotypically distinct. If the hybrid offspring survive well and reproduce to the extent that there is a large population of hybrid individuals that breed between themselves but do not interbreed with either of the two original parent species (the gray and the Gambel), which of the following would you say most likely led to the new hybrid species?(a) prezygotic reproductive barriers (b) sympatric speciation (c) allopatric speciation (d) postzygotic reproductive barriers (e) none of the above
Scientists are studying two populations of the same species of sea turtle. One population is quite small, with only 18 individuals, and the other is much larger, with 147 individuals. If a genetic factor such as a mutation were introduced to both populations at the same time, what could scientists predict about the impact?
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