EBK CAMPBELL BIOLOGY IN FOCUS
2nd Edition
ISBN: 8220101459299
Author: Reece
Publisher: PEARSON
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Chapter 20, Problem 4TYU
Summary Introduction
Introduction:
There are three types of phylogenetic groups such as a monophyletic group, paraphyletic group, and polyphyletic group. A monophyletic group consists of an “ancestral species” and contains all of its descendants. A paraphyletic group consists of an ancestral species, however, contains only some of its descendants, but not all. A polyphyletic group contains distantly related species, but not a recent common ancestor.
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In the figure below, Taxa I, II and III are as follows:
A.
paraphyletic, polyphyletic, monophyletic
B.
paraphyletic, monophyletic, polyphyletic
C.
polyphyletic, monophyletic, paraphyletic
D.
monophyletic, polyphyletic, paraphyletic
A taxonomic group that contains species that have similar phenotypes due to convergent evolution is
a. paraphyletic.
b. monophyletic.
c. polyphyletic.
d. a good cladistic group.
Monophyletic groups are desirable in classification as they
Select one:
a.reflect evolutionary relationships
b. minimise name changes from old to new classifications
c. result in fewer groups and are therefore more parsimonious
Chapter 20 Solutions
EBK CAMPBELL BIOLOGY IN FOCUS
Ch. 20.1 - Which levels of the classification in Figure 20.3...Ch. 20.1 - Which of the trees shown here depicts an...Ch. 20.1 - Prob. 3CCCh. 20.2 - Decide whether each of the following pairs of...Ch. 20.2 - WHAT IF? Suppose that two species, A and B, have...Ch. 20.3 - Prob. 1CCCh. 20.3 - The most parsimonious tree of evolutionary...Ch. 20.3 - WHAT IF? Draw a phylogenetic tree that includes...Ch. 20.4 - What is a molecular clock? What assumption...Ch. 20.4 - MAKE CONNECTIONS Review Concept 14.5. Then...
Ch. 20.4 - WHAT IF? Suppose a molecular clock dates the...Ch. 20.5 - Why is the kingdom Monera no longer considered a...Ch. 20.5 - Prob. 2CCCh. 20.5 - Prob. 3CCCh. 20 - In a comparison of birds and mammals, the...Ch. 20 - To apply parsimony to constructing a phylogenetic...Ch. 20 - Prob. 4TYUCh. 20 - Prob. 5TYUCh. 20 - If you were using cladistics to build a...Ch. 20 - Prob. 7TYUCh. 20 - SCIENTIFIC INQUIRY DRAW IT (a) Draw a phylogenetic...Ch. 20 - FOCUS ON EVOLUTION Darwin suggested looking at a...Ch. 20 - Prob. 10TYUCh. 20 - SYNTHESIZE YOUR KNOWLEDGE This West Indian manatee...
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- Two different monophyletic groups that share common ancestry with each other more recently than either does with other taxa are known as?arrow_forwardSpecies recognized by the phylogenetic species concept a. sometimes also would be recognized as species by the biological species concept. b. are sometimes paraphyletic. c. are characterized by symplesiomorphies. d. are more frequent in plants than in animals.arrow_forwardQ1: It is a group descending from one common ancestor A. Monophyletic B. Polyphyletic C. Periphyletic D. Paraphyletic Q2: It is a group descending from more than one ancestors A. Monophyletic B. Periphyletic C. Paraphyletic D. Polyphyletic Q3: Which of the following characters is not homologous to a bird’s wings? A. A human’s limbs B. A butterfly’s wings C. A bat’s wings D. A whale’s flippersarrow_forward
- In a paraphyletic group a. all species are more closely related to each other than they are to a species outside the group. b. evolutionary reversal is common. c. polyphyly also usually occurs. d. some species are more closely related to species outside the group than they are to some species within the group.arrow_forwarda. draw a diagonal tree b. Which organism is an outgroup? c. Which organisms are sister taxa or share a common ancestor?arrow_forwardA shared ancestral feature is a/an select one a. symplesiomorphy b.synapomorphy c.autapomorphyarrow_forward
- A good “phylogenetic” species is one that is A. The smallest diagnosable cluster of organisms within which there is a pattern of ancestry and descent B. The most inclusive population of individuals having the potential for phenotypic cohesion through intrinsic cohesion mechanisms. C. Morphologically distinctive from other groups of organisms D. An actually or potentially interbreeding group that is reproductively isolated from other such groups.arrow_forwardFrom above answer the following and explain why you chose what?A) will you be considering I and J from tree to be monophyletic? B) is E to J on tree form monophyletic group? C) what is sister genus of C and D D) is E and G monophyletic?arrow_forwardParaphyletic groups... A. represent the most recent common ancestor and all of the descendants B. Are a potential consequence of secondary loss of a trait C. Are often created when attempting to build phylogenies for species that have undergone convergent evolution D. Are more likely when making trees using the biological species conceptarrow_forward
- In a phylogenetic tree, Species 1 and 2 are distantly related to one another but are both darkly pigmented. Species 3 which is unpigmented is a sister taxon to Species 2. The common ancestor to all three species is darkly pigmented; thus, this trait in the phylogeny is considered to be a - A. homoplasy. B. synapomorphy. C. apomorphy. D. symplesiomorphy.arrow_forwardA taxon composed of all species derived from a common ancestoris referred to asa. a phylum.b. a monophyletic group or clade.c. a genus.d. an outgroup.e. all of the abovearrow_forwardOf the following taxonomic categories which is the most inclusive (i.e. is the highest in hierarchy)? A. Order B. Subspecies C. Class D. Genusarrow_forward
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