Biology: Life on Earth with Physiology Plus Mastering Biology with Pearson eText -- Access Card Package (11th Edition)
11th Edition
ISBN: 9780133910605
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 16, Problem 4FIB
A random form of evolution is called ________. This form of evolution occurs more rapidly and has a greater effect in populations that are ________. Two Important causes of this form of evolution are ________ and ________. Which of these would apply to a population started by a breeding pair that was stranded on an island?
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Natural selection acts upon ____________________________, evolution upon _______________________________.
What is the gene pool and how does natural selection act upon it?
If a version of a gene confers an advantage to survival and reproduction, that version of the gene will be favored by natural selection and we can expect the frequency of that gene to ______________________ within the population over time.
Versions of the gene that do not confer an advantage (or confer a disadvantage) should become _______________ prevalent .
This generation to generation change in the gene pool is called ________________________.
Changes to the genetic makeup of a population and the individuals within it can arise via two mechanisms. List and describe both. Both of these processes are ________________________________.
Once created, new combinations of genes will be acted upon by _________new alleles_______________________.
How is Darwinian “fitness” different than the typical definition used in…
Henry was studying two populations of the same species of lizards. One population lived on an island and the other lived
on the mainland. Both populations were affected by a hurricane that hit the island and the mainland with equal force. A
year later, Henry was testing the gene frequency and saw a decrease in genetic variation in the island species, but not in
the mainland species. Which best describes a conclusion he might have reached?
Gene flow greatly affects small populations, but large populations can recover.
Genetic drift greatly affects small populations, but large populations can recover.
Gene flow greatly affects large populations, but small populations can recover.
Genetic drift greatly affects large populations, but small populations can recover.
Evolution is a process of___
in a population through___
variation over___
Evolution involves___
and___.
Chapter 16 Solutions
Biology: Life on Earth with Physiology Plus Mastering Biology with Pearson eText -- Access Card Package (11th Edition)
Ch. 16.1 - define evolution in terms of concepts from...Ch. 16.1 - define equilibrium population and describe the...Ch. 16.2 - Evolution of a Menace The mutant alleles that...Ch. 16.2 - describe how mutation, gene flow, genetic drift,...Ch. 16.2 - A flu vaccination stimulates your immune system to...Ch. 16.2 - If it were true that mutations do occur in...Ch. 16.2 - Explain how the distribution of genotypes in...Ch. 16.2 - If a population grows large again after a...Ch. 16.2 - Prob. 4TCCh. 16.3 - describe why selection of phenotypes can affect...
Ch. 16.3 - A team of phys clans treated four patients with...Ch. 16.3 - If we studied a population of bighorn sheep and...Ch. 16.3 - explain how competition and predation influence...Ch. 16.3 - When selection is directional, is there any limit...Ch. 16.3 - Prob. 3CYLCh. 16.3 - Microbiologists have discovered that alleles...Ch. 16.3 - compare and contrast directional selection,...Ch. 16 - In North America, the average height of adult...Ch. 16 - The ______ provides a simple mathematical model...Ch. 16 - The alleles responsible for antibiotic resistance...Ch. 16 - What is a gene pool? How would you determine the...Ch. 16 - By the 1940s, the whooping crane population had...Ch. 16 - Different versions of the same gene are called...Ch. 16 - Stabilizing selection on a trait tends to a. make...Ch. 16 - Define equilibrium population. Outline the...Ch. 16 - An organisms ______ refers to the specific alleles...Ch. 16 - An adaptation is a. any trait that arises from a...Ch. 16 - How does population size affect the likelihood of...Ch. 16 - A random form of evolution is called ________....Ch. 16 - Which of the following statements about mutations...Ch. 16 - If you measured the allele frequencies of a gene...Ch. 16 - Competition is most Intense between members of...Ch. 16 - Genetic drift occurs a. when different phenotypes...Ch. 16 - People like to say that you cant prove a negative....Ch. 16 - The evolutionary fitness of an organism is...Ch. 16 - Describe the three ways in which natural selection...Ch. 16 - What is sexual selection? How is sexual selection...
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- The evolution of one species into two or more species as a result of different populations becoming reproductively isolated from each other is best termed as adaptive radiation. True or False.arrow_forwardA severe fire or flood kills 90% of a population of squirrels in a forest. The remaining squirrels evolve into a population quite distinct from the original. In another forest, a bacterial infection kills 90% of the squirrels in the forest, and the remaining squirrels also evolve into a distinct population. The first instance is considered genetic drift, and the second is natural selection. Explain the difference.arrow_forwardA farmer uses DDT to kill insects in his field. The first year nearly all of the insects were killed. By the fourth year, however, nearly all of the insects survived the DDT treatment. Explain the process of natural selection in this population of insects. Include these words - mutation, phenotype, variation, resistance, adaptation, and differential survival.arrow_forward
- The gene pool of the peppered moth population in England changed. As a result, the frequency of the black allele in the population increased, while the frequency of the white allele decreased. Which of the following statements correctly describes why the allele frequencies changed in the peppered moth population? a The white moths die more often compared to the black moths due to the random mutation in the lichen population. b The white allele became less common as a result of sexual selection. Black moths reproduced more often due to the female preferring dark colors to light colors. c Black soot from the burning of coal discolored the bark of local trees; black moths became more common because they blended in better, and survived to reproduce more often than white moths. d The industrial revolution in England produced a harmful chemical toxin that killed the white moths, but did not affect the black moths.arrow_forwardA change in structure, behavior, or physiology that enhances survival, and reproductive success in a particular environment is called _________.   Genetic drift   Mimcry   Adaptation   Gene flowarrow_forwardAn organism’s___________ refers to the specific alleles found within its chromosomes, while the traits that these alleles produce are called its_________ . Which of these does natural selection act on?__________arrow_forward
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