EBK BIOLOGY
6th Edition
ISBN: 9780134819150
Author: Maier
Publisher: VST
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Chapter 13, Problem 1AAATB
Summary Introduction
To investigate:
The two wolf populations in Alaska and northern Great Lakes can be considered different species. The information required to examine this.
Introduction:
When the environment creates an outside barrier to reproduction, such as a mountain range or river, it is known as reproductive isolation. A genealogical species can be defined as a base group of organisms whose members are associated more closely to each other than to outside organisms. These do not contain any outside group.
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The red wolf (Canis rufus) was once widespread in the southeastern United States but was declared to be extinct in the wild. Biologists bred captive red wolf individuals and reintroduced them into areas of eastern North Carolina, where they are federally protected as endangered species. The current wild population is estimated to be about 100 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 For this reason, some people think that the endangered status of the red wolf should be withdrawn and resources should not be spent to protect what is not a “pure” species. Do you agree? Why or why not?
There are six species of animals in an area at the end of Thunder Bay. The area is wooded land covering rolling hills with two small rivers. Most of the area is surrounded by farm land where people have sheep and cows. There are three roads in the area, one of which leads to an expanding subdivision.
a) Chose the species you believe to be most likely to become endangered and the species you believe to be least likely to become endangered. Compare and contrast these two species to explain your decision
b) Which two species do you think would be most likely to exhibit a competitive relationship?
c) Explain two density-dependent factors that may affect population P in this area
d) Explain two density-independent factors that may affect population P in this area
A small Arctic nesting goose have goslings (baby geese) that exist in two color morphs, grey or yellow. A population of geese included 263 yellow goslings and 413 grey goslings. Assume that grey is dominant and that the population is in HWE. There is no difference between yellow and grey goslings once they have matured. However, yellow goslings are at an increased risk of predation. If 303 grey goslings survive to adulthood, but only 150 yellow ones do, predict the effect of selection on the genotypic frequencies in the next generation.
choices:
GG = 0.22 Gg = 0.53 gg = 0..251
GG = 0.321 Gg = 0.525 gg = 0.154
GG = 0.175 Gg = 0.632 gg = 0.193
GG = 0.155 Gg = 0.514 gg = 0.331
Chapter 13 Solutions
EBK BIOLOGY
Ch. 13 - Define biological species.Ch. 13 - Prob. 2LTBCh. 13 - Prob. 3LTBCh. 13 - Prob. 4LTBCh. 13 - Prob. 5LTBCh. 13 - Prob. 6LTBCh. 13 - The biological definition of race corresponds to...Ch. 13 - All of the following statements support the...Ch. 13 - Similarity in skin color among different human...Ch. 13 - Prob. 10LTB
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