Biology
11th Edition
ISBN: 9781259188138
Author: Peter H Raven, George B Johnson Professor, Kenneth A. Mason Dr. Ph.D., Jonathan Losos Dr., Susan Singer
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 23, Problem 3U
The principle of parsimony
a. helps evolutionary biologists distinguish among competing phylogenetic hypotheses.
b. does not require that the polarity of traits be determined.
c. is a way to avoid having to use outgroups in a phylogenetic analysis.
d. cannot be applied to molecular traits.
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To apply parsimony to constructing a phylogenetic tree, (A) choose the tree that assumes all evolutionary changes are equally probable. (B) choose the tree in which the branch points are based on as many shared derived characters as possible. (C) choose the tree that represents the fewest evolutionary changes,in either DNA sequences or morphology. (D) choose the tree with the fewest branch points.
The principle of parsimony
a. helps evolutionary biologists distinguish among competing phylogenetic hypotheses.
b. does not require that the polarity of traits be determined.
c. is a way to avoid having to use outgroups in a phylogenetic analysis.
d. cannot be applied to molecular traits.
Which method of building phylogenetic trees relies on both the number of evolutionary transitions on the phylogenetic tree and the likelihood of the evolutionary transitions?
a.
Maximum Credibility
b.
Maximum Likelihood
c.
Parsimony
d.
Bootstrapping
Chapter 23 Solutions
Biology
Ch. 23 - Overall similarity of phenotypes may not always...Ch. 23 - a. is based on overall similarity of phenotypes....Ch. 23 - The principle of parsimony a. helps evolutionary...Ch. 23 - Parsimony suggests that parental care in birds,...Ch. 23 - The forelimb of a bird and the forelimb of a...Ch. 23 - In order to determine polarity for different...Ch. 23 - In a paraphyletic group a. all species are more...Ch. 23 - A paraphyletic group includes a. an ancestor and...Ch. 23 - Prob. 9UCh. 23 - A taxonomic group that contains species that have...
Ch. 23 - Rapid rates of character change relative to the...Ch. 23 - Species recognized by the phylogenetic species...Ch. 23 - Prob. 1SCh. 23 - Identifying outgroups is a central component of...Ch. 23 - As noted in your reading, cladistics is a widely...Ch. 23 - Across many species of limpets, loss of larval...Ch. 23 - Birds, pterosaurs (a type of flying reptile that...Ch. 23 - AID:1825 | 10/04/2018 6. In what sense does the...
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- Rapid rates of character change relative to the rate of speciation pose a problem for cladistics because a. the frequency with which distantly related species evolve the same derived character state may be high. b. evolutionary reversals may occur frequently. c. homoplasy will be common. d. All of the choices are correct.arrow_forwardWhat consequences does horizontal gene transfer pose for evolutionary biologists? a. It can pose difficulty in the reconstruction of phylogenetic trees, because it can obscure phylogenetic relationships. b. It can pose physiological problems in some organisms, making it very hard to study them. c. It can pose difficulty in breeding between different individuals of the same species. d. Because it is transfer of genes between the same species, it can make individuals look very more similar than they actually are. e. All of the above.arrow_forwardCladistic methods: a. have distinct criteria for recognizing genera versus species. b. rely equally on all traits that can be measured or observed. c. cannot be used below the level of the species (e.g., to identify races). d. classify organisms based on shared ancestry e. all of the above are correctarrow_forward
- What is a Homology? A) When an anatomic feature is shared among organisms and their descendants B) When two organisms appear the same C) When convergent evolution produces similar phenotypesarrow_forwardWhat is the phylogenetic definition of a species? A) A group of individuals that can breed and produce viable offspring B) A group of interbreeding individuals that share the same environment C) A group of individuals that share a common ancestorarrow_forwardWhat kind of trait is important to cladistics? a. shared derived traits b. shared ancestral traits c. analogous traits d. parsimonious traitsarrow_forward
- What is an Analogy? A) When an anatomic feature is shared among organisms and their descendants B) When two organisms appear the same C) When convergent evolution produces similar phenotypesarrow_forwardYou are evaluating five phylogenetic trees generated from a single cladistics analysis. Tree A shows 21 evolutionary events (i.e. the evolution of a shared, derived trait), Tree B shows 7 events, Tree C shows 18 events, Tree D shows 10 events, and Tree E shows 9 events. Which tree is most likely the correct one? Group of answer choices Tree A Tree D Tree B Tree E Tree Carrow_forwardA phylogenetic tree is different from a cladogram in that ... Group of answer choices A: it shows that all species are not related to a common ancestor, but each has a distinct archetype. B: it represents the time scale of evolution, including where extinct species fit in. C: it uses an outgroup to compare a small group of species that exhibit similar traits D: it is not based on genetic or morphological evidence.arrow_forward
- What problems does horizontal gene transfer cause for evolutionary biologists? a. It can make the reconstruction of phylogenetic trees difficult because it can obscure phylogenetic relationships. b. It can cause physiological problems in some organisms, making it hard to study them. c. It can make breeding between different individuals of the same species difficult. d. Because it is the transfer of genes between the same species, it can make individuals look more similar than they actually are. e. All of the above.arrow_forwardWhich of the following statement about the outcome of the evolution of a new species through hybridization is false? a.The new species may have traits that allow it to inhibit environments different from both parental species. b.The new species is always an intermediate of the two parental species c.The new species may have greater genetic diversity and greater trait diversity than the parental species. d.None of the above What are the two ways of looking into evolution in detail? a.Micro frequency change and ascent with modification b.Genotypic and phenotypic modification c.DNA frequency change and inheritance modification d.Allele frequency change and descent with modification Natural selection increases the frequencies of advantageous alleles and decreases deleterious alleles' frequencies. What are the three categories of natural selection depending on the favored traits? a.Directive, selective and native b.Indicative, normative and fixative c.Directional, stabilizing and…arrow_forwardDoes the use of DNA sequences in the study of evolutionary relationships mean that other characteristics are unimportant in such studies? Discuss what other forms of evidence you may still want to use, along with when and why those other forms of evidence would be especially helpful.arrow_forward
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