Our Origins: Discovering Physical Anthropology (Fourth Edition)
4th Edition
ISBN: 9780393614008
Author: Clark Spencer Larsen
Publisher: W. W. Norton & Company
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Chapter 4, Problem 5SQ
Summary Introduction
Introduction: The evolution is the process by which the heritable characteristics of an organism change over successive generations. It is often results in new species development. These heritable characteristics are the expressions of genes that passed during reproduction from parent to offspring.
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If reinforcement is weak and hybrids are not completely infertile,
a. genetic divergence between populations may be overcome by gene flow.
b. speciation will occur 100% of the time.
c. gene flow between populations will be impossible.
d. the speciation will be more likely than if hybrids were completely infertile.
Define
a. mutation
b. natural selection
c. founder effect
d. bottleneck
e. gene flow
f. nonrandom mating
Which of the following traits does not describe a r-selected species?
A. rapid development
B. low parental investment
C. high reproductive rates
D. short life spans
E. late maturation
Chapter 4 Solutions
Our Origins: Discovering Physical Anthropology (Fourth Edition)
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- Gene flow occurs a. when individuals within a population interbreed. b. as a result of genetic drift. c. as a result of mutations in one population but not in another. d. when an individual migrates between two otherwise isolated populations of a species.arrow_forwarddescribe the modern theory of evoluton and discuss how it is supported by evidence from two of the following three areas a.population genetics b.molecular biology c.comparative anatomy and embryology evolution is one of the major unifying concepts of modern biology.explain the mechanism that lead to evolutionary change.describe how scientists use each of the following as evidence fornevolution a.bacterial resistance to antibiotics b.comparative biochemistry c.the fossil recordsarrow_forwardDefine gene mutation Group of answer choices A. the process whereby organisms better adapted to their environment tend to survive and produce more offspring. B. the introduction of genetic material (by interbreeding) from one population of a species to another, thereby changing the composition of the gene pool of the receiving population C. variation in the relative frequency of different genotypes in a small population, owing to the chance disappearance of particular genes as individuals die or do not reproduce. D. A rare and random change in a gene that can be bad or benef icial depending on the environment .arrow_forward
- Are gene mutations caused by selective pressures in the environment? In other words, do gene mutations arise in an organism out of need or want? Group of answer choices A. No, because gene mutations are not purely random. B. Yes, because gene mutations are not purely random. C. No, because gene mutations are purely random. D. Yes, because gene mutations are purely random.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_forwardGene flow depends on a. migration. b. the ability of migrant alleles to be passed to subsequent generations. c. genetic drift. d. both a and b.arrow_forward
- Which of the following is an example of gene flow? a. horizontal gene transfer b. sexual selection c. genetic drift d. mutationarrow_forwardTwo parents, who are thought to be different species, mate and produce viable hybrid offspring. When two of these hybrids mate, their offspring are not viable. What is the BEST interpretation of this data? A. The original parents are the same species because they can breed together. B. The original parents are the same species because they can breed together and produce viable offspring. C. The original parents are not the same species because they produce hybrids that impair the species’ development or survival in its environment. D. The original parents are not the same species because they produce hybrids that can have reduced viability and fertility when they mate.arrow_forwardThe Old Order Amish is a relatively small population of individuals found in the United States in Pennsylvania and Ohio. They are a very isolated population due to their strong religious beliefs and lifestyle that have continued for more than 200 years. They mostly select mates from within their own population, which has had significant effects on their gene pool.The effects on their gene pool is a result of a. non-random mating b. founder effect c. mutation d. bottleneck effectarrow_forward
- Which of the following might occur in the same geographic area but actually be an example of micro-allopatry? A. A population of moths that becomes polymorphic for mating pheromones B. Jumping spiders in which a new mutation leads some males to do a novel mating dance to attract females C. Chromosomal duplication in a plant that reproductively isolate it D. Flightless aphids where a mutation leads a portion of the population to specialize on a different food plantarrow_forwardAllopatric, but not sympatric, speciation requiresa. reproductive isolation.b. geographic isolation.c. spontaneous differences in males and females.d. prior hybridization.e. rapid rate of mutation.arrow_forwardThe biological species concept emphasizes whether populations a. look the same. b. have similar biochemical pathways. c. can have gene flow between them. d. share common ancestry. e. have similar ecological requirements.arrow_forward
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