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To explain: Some people think that the endangered status of the red wolf should be withdrawn and
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
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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 For this reason, some people think that the endangered status of the red wolf should be withdrawn and resources should not be spent to protect what is not a “pure” species.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.
Chapter 14 Solutions
Campbell Essential Biology with Physiology (5th Edition)
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- In 1956, two Corsican mouflon sheep were introduced to Haute Island, which has an area of 7.00 km². In 1957, the pair were able to reproduce for the first time. By 1977, the population had grown to 600 sheep due to abundant food sources and the lack of natural predators in the area. Since then, the Haute Island sheep population has fluctuated between 200 and 600 sheep. In 1990, 250 mouflon sheep were relocated from Haute Island to a neighboring island with similar terrain, soil, vegetation, and weather patterns. The neighboring island has an area of 10.0 km². 1. Compare the density of the Corsican mouflon sheep population on Haute Island in 1977 with the neighboring island in 1990. Record your answers to three significant digits. 2.a. Explain how the growth of the Corsican mouflon sheep population on Haute Island caused interspecific competition? b. What prevented the Haute Island sheep population from increasing beyond 600 sheep?" 3. What was the growth rate of the Corsican mouflon…arrow_forwardIn 1956, two Corsican mouflon sheep were introduced to Haute Island, which has an area of 7.00 km^2. In 1957, the pair were able to reproduce for the first time. By 1977, the population had grown to 600 sheep due to abundant food sources and the lack of natural predators in the area. Since then, the Haute Island sheep population has fluctuated between 200 sheep and 600 sheep. In 1990, 250 mouflon sheep were relocated from Haute Island to a neighbouring island with similar terrain, soil, vegetation and weather patterns. The neighbouring island has an area of 10.0 km^2. 1. Compare the density of the Corsican mouflon sheep population on Haute Island in 1977 with the neighboring island in 1990. (three sig digits) 2. Explain how the growth of the Corsican mouflon sheep population on Haute Island caused interspecific competition ? 3. What prevented the Haute Island sheep population from increasing beyond 600 sheep? 4. What was the growth rate of the Corsican mouflon sheep population on…arrow_forwarda) Which species is more closely related to the Gray wolf, the Maned Wolf or the jackal (or are they equally related)? b) Which species is more closely related to the jackal, the Maned wolf or the South American foxes (or are they equally related)?arrow_forward
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