Campbell Essential Biology with Physiology (5th Edition)
Campbell Essential Biology with Physiology (5th Edition)
5th Edition
ISBN: 9780321967671
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece, Kelly A. Hogan
Publisher: PEARSON
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Chapter 14, Problem 14BS
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To explain: Some people think that the endangered status of the red wolf should be withdrawn and resources should not be spent to protect what is not a “pure” species as it is a fertile hybrid species of red wolf and coyotes.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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The current wild population is estimated to be about 50 individuals. However, a new threat to red wolves has arisen: hybridization with coyotes (Canis latrans), which have become more numerous in the areas inhabited by red wolves. Although red wolves and coyotes differ in morphology and DNA, they are capable of interbreeding and producing fertile offspring. Social behavior is the main reproductive barrier between the species and is more easily overcome when same-species mates are rare. For this reason, some people think that the endangered status of the red wolf should be withdrawn and resources should not be spent to protect what is not a “pure” species.
A population of lizards in Northern California is brown and is not poisonous to birds. A population of lizards in Southern California is orange and is poisonous to birds. In central California, where the two species overlap, a new species of non-poisonous, orange lizards arose. Which of the following statements best explains the existence of non-poisonous orange lizards? A) Non-poisonous brown lizards changed color once they noticed birds did not eat orange lizards. B) Non-poisonous orange lizards have a selective advantage since birds avoid orange lizards. C) Non-poisonous lizards turn orange by eating orange flowers and then pass the trait on D) Non-poisonous orange lizards have a selective disadvantage since they cannot blend in. E) Non-poisonous brown lizards are more attractive to mates.
A A Ao Question 45 The atmosphere is an important source of both carbon and oxygen in aquatic systems. Question 45 options: A) True B) False Question 46 Energy sources from within an aquatic system are known as allochthonous. Question 46 options: A) True B) False Question 47 Cooperative breeding is more likely to occur Question 47 options: A) when inbreeding has no effect. B) when successful dispersal is difficult. C) when most individuals are unrelated. D) when long-distance dispersal is possible.
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