Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 26, Problem 4IQ
Summary Introduction
To determine: The reason why the most accepted evolutionary tree shows birds and mammals as separate branches from the reptilian line.
Introduction: The phylogenetic tree, also known as phylogeny, shows the pattern of evolutionary descent of different organisms. It paves the way to know the evolutionary relationship between different species or groups of organisms based on their genetic and physical characteristics.
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In a phylogenetic analysis of several bird species, a researcher uses a species of reptile as an
outgroup. Which of the following is the main reason for including an outgroup in the analysis?
To identify ancestral traits shared by the bird species
To determine the overall genetic diversity of the bird species
To establish a new monophyletic group including both bird and reptile species
To analyze the convergent evolution of bird and reptile species
Which of the following conclusions is most consistent with the information in the evolutionary tree shown below?
Each branch point represents the common ancestor
of the two lineages diverging from that point.
Lungfishes
Amphibians
Mammals
Digit-bearing
limbs
Lizards
and snakes
Amnion
Crocodiles
A hatch mark represents a
homologous characteristic
shared by all the groups
to the right of the mark.
Ostriches
Feathers
Hawks and
other birds
O Mammals are more closely related to birds than to amphibians.
O Lizards and crocodiles (both of which have legs) are more closely related to each other than either is to snakes (which lack legs).
O Crocodiles are more closely related to hawks than to lizards.
O Modern lungfishes are the common ancestor of modern tetrapods.
Tetrapods
Amniotes
Reptiles
Birds
Flight evolved two times among the animals in this phylogenetic tree; once in birds, and once in bats (mammals). The branches on
which flight evolved are marked. Please click where flight would have most likely evolved if it were actually a homologous
character
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Flight
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Flight
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Hagfish
Lampreys
Lobe-finned Fish
Amphibians
Turtles
Lizards
Snakes
Crocodiles
Birds
Mammals
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Chapter 26 Solutions
Study Guide for Campbell Biology
Ch. 26 - a. In this hypothetical phylogenetic tree, which...Ch. 26 - What two complications may make it difficult to...Ch. 26 - Place the taxa (outgroup. A, B, C, and D) on the...Ch. 26 - Prob. 4IQCh. 26 - a. Give an example of genes that would be compared...Ch. 26 - Prob. 6IQCh. 26 - Prob. 7IQCh. 26 - Prob. 1SYKCh. 26 - Prob. 2SYKCh. 26 - Prob. 3SYK
Ch. 26 - Related families are grouped into the next-highest...Ch. 26 - Prob. 2TYKCh. 26 - Prob. 3TYKCh. 26 - Prob. 4TYKCh. 26 - Prob. 5TYKCh. 26 - Prob. 6TYKCh. 26 - Prob. 7TYKCh. 26 - Prob. 8TYKCh. 26 - A taxon such as the class Reptiliawhich includes...Ch. 26 - You wish to study evolutionary relationships among...Ch. 26 - Prob. 11TYKCh. 26 - Prob. 12TYKCh. 26 - Prob. 13TYKCh. 26 - Prob. 14TYKCh. 26 - Prob. 15TYKCh. 26 - Which of the following approaches would allow a...Ch. 26 - A comparative study of which of the following...Ch. 26 - Prob. 18TYKCh. 26 - Which of the following segments of DNA would...Ch. 26 - Which of the following is the best description of...Ch. 26 - Prob. 21TYK
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- 7) Examine the image of the relatedness of vertebrates represented in this phylogenetic tree. Select all the statements that are supported by this tree. A) Gray whales are the common ancestor of the Blue and Humpback whales. B) Blue and humpback whales diverged more recently than either did from the gray whale. C) The Bryde's whale shares a more recent common ancestor with the Sei whale than with the Fin whale. D) The blue and the Bryde's whale have more traits in common with each other than with any other two species, E) Southern minke whales and Northern minke whales have more traits in common with each other than with any other species. Not Gradedarrow_forwardThe phylogenetic tree for vertebrates depicted below was constructed from sequence data for two rRNA mitochondrial genes (12S and 16S). How do the results of this analysis compare with the phylogenetic trees in Figures 32.10 and 32.24? Identify the major clades of vertebrates on the tree depicted below. Source: R. Zardoya and A. Meyer. 1998. Complete mitochondrial genome suggests diapsid affinities of turtles. Proceedings of the National Academy of Sciences, USA 95:1422614231. Copyright 1998 National Academy of Sciences, U.S.A.arrow_forwardIf you were to create an evolutionary tree of modern birds, where would you expect to place the roadrunner (judging by its appearance in this figure) as compared to a house sparrow or pigeon?arrow_forward
- a) Is there a monophyletic group that includes only the tapir, rhinoceros, and equids (Horses)? If so, which animals are included? b) Is there a monophyletic group that includes only pronghorns and deer? If so, which animals are included? c) Is there a monophyletic that includes pigs and bovidss? If there is, what other animals would be a part of the monophyletic group?arrow_forwardA 2015 article in Nature has summarized the early history of jawed vertebrates using highlights from recent discoveries and how they have changed our understanding of vertebrate evolution. https://www.sciencedaily.com/releases/2014/04/140416133336.htm Question: Given these recent discoveries, how should the cladogram below change? Describe it. It will likely be helpful to reference a synapomorphy noted on the cladogram.arrow_forwardAnswer the following questions about this phylogenetic tree. What animal represents the out group in this tree and why? What is the derived characteristic of the birds? What is the shared characteristic of 3 to 6? Which number represents the common ancestor of Ostriches and Hawks?arrow_forward
- Which is NOT an example of a structural homology? Please choose all applicable options. a) All vertebrate embryos form pharyngeal pouches.b) Vertebrate forelimbs generally have the same number and a similar arrangement of bones.c) The same group of embryonic cells forms the adult jaw of a perch and of a dog.d) All organisms share a common genetic code.arrow_forwarda) What is the best estimate (mean age), in millions of years, for the divergence of the clade containing the American Giant Short Faced Bear from the clade containing the Sloth Bear? b) According to Figure 1, bears as a group experienced substantial evolutionary radiation near what geological boundary? c) True or False. An entire clade of bears has gone extinct because the two extinct bear species in the figure are sister species. d) What bears are the nearest relatives of the Sun Bear?arrow_forwardWhich of the following pieces of evidence would best support the argument that humans are more evolutionarily related to fish than they are to insects? All these organisms require oxygen to survive. The earliest fish fossils are found in the lowest strata of sedimentary rocks, followed by insects, and then humans. The early stages of embryo development in fish and humans look strikingly similar while insects develop very differently compared to both fish and humans. Fossils of ancient fish and human ancestors have been discovered in the same sedimentary rock layers.arrow_forward
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