Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 21, Problem 5TY
Summary Introduction
Introduction:
A phylogenetic tree is a diagram that presents the evolutionary relationship among different species based on biological diversity data. In a phylogenetic tree, species are found at the tip of the tree. Each branch point is called nodes and they represent divergent events. Most recent common ancestors lie at each branch point.
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Which of the following is a problem with applying the phylogenetic species concept?
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what is phylogeny?
A group whose members share one or more defining derived traits
The evolutionary history of a species or a group of species
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Phylogenetic trees are diagrams used to reflect evolutionary relationships among organisms or groups of organisms. _______ trees have a single ancestral line to which all organisms in the diagram relate to. ______ do not have a common ancestor but do show relationships among species.
Chapter 21 Solutions
Principles of Biology
Ch. 21.1 - Refer back to Figure 4.8. Which of the three...Ch. 21.1 - Prob. 1CCCh. 21.1 - Prob. 1TYKCh. 21.1 - Prob. 2TYKCh. 21.2 - Prob. 1CCCh. 21.2 - Prob. 1TYKCh. 21.2 - Prob. 2CCCh. 21.2 - Prob. 2TYKCh. 21.2 - Prob. 3TYKCh. 21.3 - What shared derived character is common to the...
Ch. 21.3 - Prob. 2CCCh. 21.3 - Prob. 1TYKCh. 21.3 - Prob. 2TYKCh. 21.4 - Prob. 1BCCh. 21.4 - Prob. 1CCCh. 21.4 - Prob. 1TYKCh. 21.4 - An analysis of the number of neutral genetic...Ch. 21.5 - Prob. 1CCCh. 21.5 - Which of the following is an example of horizontal...Ch. 21 - Prob. 1TYCh. 21 - Which of the following is the correct order of the...Ch. 21 - Which type of taxon consists of organisms with the...Ch. 21 - Prob. 4TYCh. 21 - Prob. 5TYCh. 21 - Prob. 6TYCh. 21 - Prob. 7TYCh. 21 - Prob. 8TYCh. 21 - The concept that the preferred hypothesis is (lie...Ch. 21 - Prob. 10TYCh. 21 - Prob. 1CCQCh. 21 - What is a molecular clock? How is it used in...Ch. 21 - Prob. 3CCQCh. 21 - Prob. 1CBQCh. 21 - Prob. 2CBQ
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- Each branching point in a cladogram (a) is called a root (b) represents a clade (c) represents the divergence of two or more groups from a common ancestor (d) represents horizontal gene transfer (e) marks the divergence of two kingdomsarrow_forwardStructures shared by species because of descent from a common ancestor is referred to as... Group of answer choices homology cladistics analogy homoplasy taxonomyarrow_forwardBelow is a phylogenetic tree. Which of the following statements is correct? Species C and D are called sibling taxa because both are derived from the same parent species H. Species F is more related to species K than species D is. Species A, B, and D share a common ancestor of species I. All species shown are currently with us. All of the abovearrow_forward
- The tail flukes of a whale are _________to the tails of fish- they are not anatomically the same but evolved due to similar selection pressures. Group of answer choices homologous synapomophic convergent sister cladesarrow_forwardOn a phylogenetic tree, which term refers to lineages that diverged from the same place? a. sister taxa b. basal taxa c. rooted taxa d. dichotomous taxaarrow_forwardWhich specific type of character state is most useful in constructing a phylogenetic tree? options: shared derived state ancestral state uniquely derived state derived statearrow_forward
- A 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_forwardWhich of the following is FALSE regarding phylogenetic trees? 1) The branch lengths on the tree are scaled to molecular (DNA) changes and/or time. 2)Phylogenetic trees have shown us that there is much more bacterial diversity compared to eukaryotes. 3) Phylogenetic trees show the evolutionary relatedness of different organisms. 4). The branch lengths on the tree depict abiotic and biotic factors affecting speciation.arrow_forwardA phylogenetic tree represents... a hypothesis about evolutionary relationships a branch point for species Binomial nomenclature Relationship between sister taxa Breakdown between large groups like kingdoms and small groups like speciesarrow_forward
- Which statement is usually true about phylogenetic trees? a) nodes represent points when traits have evolved b) branch tips that are next to each other are more closely related c) the branching pattern describes the hypothesized evolutionary relationships between the taxa d) the order of the branch tips (left to right) indicates which taxa are more advanced evolutionarilyarrow_forwardA polytomy of three taxa indicates three descendants evolved from their immediate common ancestor. True or Falsearrow_forwardsimilar structures in closely related organisms are considered to be (fill in the blank) While those in distantly related organisms are considered to be (fill in the blank) fill in the blank with the word choices: sympatric, homologous, allopatric, or convergentarrow_forward
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