Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 44, Problem 7SQ
Summary Introduction
Concept introduction: Population genetics describes the natural selection by defining the species adaptations to their environment. Natural selection is a process in which the organisms adapt to the environment by means of reproduction that selectively have changes in its genotypes. This influences the number of offspring and its life histories.
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Some females seem to prefer the green colouration and some females seem to prefer the blue colouration. What type of selection is this an example of?
a. stabilizing
b. balancing
c. directional
d. diversifying
The Grants have studied finches on the Galapagos Islabds for 40+ years. During times of drought there is less green/flowering vegetation available as a good source for the finches. This leaves only the hard seeds. The grants have found that during drought, finches with larger beaks survive at a higher rate because they can access food source. This would be an example of ____
A.Selective pressure
B. good genes hypothesis
C. handicap principle
D. population variation
A. Stabilizing Selection
B. Disruptive Selection
C. Directional Selection
D. Normal Selection
26. A biologist studying wolves has collected data on the mass of meat caught per day from
hunts by packs varying in size from 2 to 15 wolves. The data show that as pack size
increases, the mass of meat available per pack member per day increases. Which additional
study would provide evidence that pack hunting provides an advantage?
A. Measure and compare the abili ty of wolves of varying ages to successfully engage in hunting.
B. Observe whether an individual wolf hunts different types of prey than a pack of wolves hunts.
C. Measure the ratio of male to female wolves engaging in hunting to see if it varies with pack size.
D. Compare the average number of pups per litter that reach reproductive age for wolf packs of
different sizes.
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Chapter 44 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 44 - Iguana Decline In 1987, Martin Wikelski began a...Ch. 44 - Iguana Decline In 1987, Martin Wikelski began a...Ch. 44 - Iguana Decline In 1987, Martin Wikelski began a...Ch. 44 - Most commonly, individuals of a population show a...Ch. 44 - The rate at which population size grows or...Ch. 44 - Suppose 200 fish are marked and released in a...Ch. 44 - Prob. 4SQCh. 44 - For a given species, the maximum rate of increase...Ch. 44 - ______ is a density-independent factor that...Ch. 44 - Prob. 7SQ
Ch. 44 - Prob. 8SQCh. 44 - The human population is now about 7 billion. It...Ch. 44 - Prob. 10SQCh. 44 - Prob. 11SQCh. 44 - Prob. 12SQCh. 44 - The demographic transition model predicts a...Ch. 44 - Prob. 14SQCh. 44 - Match each term with its most suitable...Ch. 44 - Think back to Section 44.6. When researchers moved...Ch. 44 - Mountain gorillas are a highly endangered primate...Ch. 44 - Bluebirds are songbirds that, like wood ducks,...Ch. 44 - The age structure diagrams for two hypothetical...
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- Birds with average-sized wings survive storms better than those with longer wings or shorter wings. This illustrates _____. a directional selection b disruptive selection c the bottleneck effect d stabilizing selectionarrow_forwardIn many bird species, sex is preceded by a courtship dance. If a male’s dance is unrecognized by the female, she will not mate with him. This is an example of______ . a. sexual selection c. reproductive isolation b. behavioral isolation d. all of the abovearrow_forwardSelective pressures are those aspects of the environment that determine whether a gene mutation is helpful, what contributes to the selective pressure that determines the fur color of rock pocket mice Group of answer choices A. Litter size and Visual predators B. Visual predators and Rock color C. Genetic mutations and Visual predators D. Water availability and Litter size E. Food availability and Rock colorarrow_forward
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- The Grants have studied finches on the Galapagos Islands for 40+ years. During times of drought, there is less green/flowering vegetation available as a food source for the finches. This leaves only the hard, thorny seeds. The Grants have found that during drought, finches with larger beaks survive at a higher rate because they can access the food source. This would be an example of __________. a. good genes hypothesis b. selective pressure c. handicap principle d. population variationarrow_forwardIntentionally breeding dogs for favorable traits to express in their offspring is an example of ___________ selection. Group of answer choices A-sexual B-artificial C-domestic D-natural E-biologicalarrow_forwardWhen males and females of a population look or act differently, it is referred to as ________. a. sexual dimorphism b. sexual selection c. diversifying selection d. a clinearrow_forward
- A population of ducks had dull orange bills and an average size of 18 inches from bill to tail. Over time, some researches noticed that the average size of the ducks was still 18 inches, but that now many ducks were either much smaller or much larger and no ducks were actually 18 inches long. The researcher correctly identified that the ducks were undergoing ___A___ selection for size, The researcher also noticed that the bills were a much brighter orange in the ducks, and correctly identified ____B____ selection for bill colouration. A few years later, the researcher returned and noticed that only the male ducks now had bright orange bills and the females were less bright. The researcher hypothesized that ____C____ selection was occurring. Question 4 options: 123 Disruptive 123 Sexual 123 Directional 1. A 2. B 3. Carrow_forwardThe best argument for how an unprotected species can evolve to mimic a second protected species (distasteful or noxious) and thus obtain protection is by A. Random changes in the appearance of the unprotected species that lead to increased fitness due to greater similarity with the protected species B. Individuals deciding that they need protection and mutating to look like the protected species C. Individuals changing their diet to increase pigment production to look like the protected species D. Natural selection for more advanced traits that are better to the inferior traits of organisms that do not look like the protected species E. Behavioral modification of the unprotected species to act like the protected speciesarrow_forwardDefine a. mutation b. natural selection c. founder effect d. bottleneck e. gene flow f. nonrandom matingarrow_forward
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