BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
3rd Edition
ISBN: 9781260670929
Author: Hoefnagels
Publisher: MCG CUSTOM
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Textbook Question
Chapter 12, Problem 9MCQ
Darwin observed that different types of organisms were found on either side of a geographic barrier. The barrier was preventing
| a. | migration. |
| b. | genetic drift. |
| c. | sexual selection. |
| d. | mutation. |
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Darwin based his Theory of Evolution by Natural Selection on series of observations. Which of the following is not associated with his theory?
a) individuals in a population vary phenotypically
b) organisms tend to under-reproduce themselves
c) there are limited resources for which individuals compete
d) some variations possessed by individuals of a population are inherited
What does the term evolution mean?
A.
The characteristics of species become more complex over time.
B.
The strongest individuals produce the most offspring.
C.
The characteristics of an individual change through the course of its life, in response to natural selection.
D.
The characteristics of populations change through time.
Which one of the four forces of evolution has the smallest effect on changing allele frequencies?
a.
Drift
b.
Gene flow
c.
Mutation
d.
Selection
Chapter 12 Solutions
BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
Ch. 12.1 - What are two ways to define evolution?Ch. 12.1 - Prob. 2MCCh. 12.2 - Prob. 1MCCh. 12.2 - What did Darwin observe that led him to develop...Ch. 12.2 - What is modern evolutionary synthesis?Ch. 12.3 - Prob. 1MCCh. 12.3 - Prob. 2MCCh. 12.3 - Prob. 3MCCh. 12.3 - Prob. 4MCCh. 12.4 - Prob. 1MC
Ch. 12.4 - Why doesnt Hardy-Weinberg equilibrium occur in...Ch. 12.5 - Distinguish among directional, disruptive, and...Ch. 12.5 - How can natural selection maintain harmful alleles...Ch. 12.6 - Prob. 1MCCh. 12.6 - Prob. 2MCCh. 12.7 - How do mutations affect an organisms phenotype?Ch. 12.7 - South china tigers once had two color patterns...Ch. 12.7 - Prob. 3MCCh. 12.7 - Prob. 4MCCh. 12 - Microevolution applies to changes that occur a....Ch. 12 - Biological evolution describes how ____ change...Ch. 12 - Prob. 3MCQCh. 12 - What is the most accurate way to explain the...Ch. 12 - Suppose that after an environmental change, foxes...Ch. 12 - Huntington disease is caused by a rare, lethal,...Ch. 12 - A population of 100 sea stars is in Hardy-Weinberg...Ch. 12 - Prob. 8MCQCh. 12 - Darwin observed that different types of organisms...Ch. 12 - Which of the following processes is nonrandom? a....Ch. 12 - Prob. 1WIOCh. 12 - Prob. 2WIOCh. 12 - Explain how understanding evolution is important...Ch. 12 - Write a paragraph that describes the connections...Ch. 12 - Jellyfish Lake, located on the Pacific island of...Ch. 12 - Prob. 6WIOCh. 12 - Explain how harmful recessive alleles can persist...Ch. 12 - Prob. 8WIOCh. 12 - Describe the competing selective forces acting on...Ch. 12 - Some researchers suggest that a giraffes long neck...Ch. 12 - Burning Question 12.1 explains why an organism...Ch. 12 - Review the Survey the Landscape figure in the...Ch. 12 - Describe situations in which the five mechanisms...Ch. 12 - Prob. 3PIT
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- Which scientific concept did Charles Darwin and Alfred Wallace independently discover? a. mutation b. natural selection c. overbreeding d. sexual reproductionarrow_forward_________is the original source of new alleles. a. Mutation c. Gene flow b. Natural selection d. Genetic driftarrow_forwardA farmer breeds sheep with the desired traits of disease resistance and tine wool. After several decades of breeding efforts, the farmer's flock is resistant to disease and produces fine wool. Which evolutionary mechanism is responsible for the changes in the gene pool of the farmer's flock? A:Sexual selection B:Artificial selection C:Natural selection D:Gene flowarrow_forward
- As a mechanism of evolution, natural selection can be most closely equated with a. random mating. b. genetic drift. c. unequal reproductive success. d. gene flow.arrow_forwardDarwin emphasized that evolution via natural selection leads only to a) progress as defined by increasing heterogeneity. b) higher and lower forms within the same species of organism. c) the establishment of some societies that are more civilized than others. d) increasing adaptation between organisms and their given environment.arrow_forwardBlack-footed ferrets are an endangered weasel found in the Great Plains. If fire swept through the plains and only a few members of a population survive (lowering the gene pool) , what did they experience? a.Bottleneck Effect B.Founder Effect C.Mutation D.Natural Selectionarrow_forward
- How did Darwin support the idea that natural selection can produce evolutionary change? Group of answer choices A. he examined how humans produced domesticated plant and animal breeds B. he just thought it had to be true C. he invented a time machine to go back and check it out for himself D. he observed wild populations to see natural selection in actionarrow_forwardWhich of the four evolutionary mechanisms make a population better adapted to its environment? A. Migration B. Genetic drift C. Mutations D. Natural selection. arrow_forwardEvolution that results because certain genotypes have a higher reproductive success is based on a. genetic variation. c. genetic drift. b. natural selection. d. both a and b.arrow_forward
- Which of the following is not a trait on which natural selection can act? a size of ears b fur/hair color c broken bones d thickness of furarrow_forwardAccording to Darwin’s model of evolution, evolution can only occur if there is some variation present among the individual members of a population. Which statement best describes the source of this variation among members of a species? A) variation exists because different individuals will have different access to food and other resources B) individuals will vary depending on geography and climate C) variation exists because not all genes will be affected D) variation among individuals may arise as a result of mutations in the genetic codearrow_forwardWhat evidence did Darwin use to support his theory of evolution by natural selection? Describe three. a. b. c. What scientific evidence has been discovered since Darwin’s time that supports evolution by natural selection? List three a. b. c.arrow_forward
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