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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Textbook Question
Chapter 26, Problem 20TYK
Which of the following is the best description of our current hypothesis of the tree of life?
- a. The tree of life consists of three domains: Bacteria, Archaea, and Eukarya.
- b. The domain Archaea is known to be the first branch; domains Bacteria and Eukarya are more closely related to each other.
- c. There was substantial horizontal gene transfer between different organisms during the early history of life.
- d. Both a and c represent our current hypothesis.
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Students have asked these similar questions
Which of the following pairs of taxa are most closely related?
A.
Eubacteria and Archaea
B.
Archaea and Eukarya
C.
Eubacteria and the Last Universal Common Ancestor
D.
Eukarya and Eubacteria
E.
Eukarya and the Last Universal Common Ancestor?
All living things are divided into three domains: bacteria, archaea, and eukarya. They have several traits that are specific to each domain or shared across the domains.
Based on this information, what traits would the last universal common ancestor (LUCA) be expected to have?
A. Nuclear envelope, introns in genes, and peptidoglycan in cell walls.
B. Histones associated with DNA, circular chromosome, and peptidoglycan in cell walls.
C. Unbranched hydrocarbons in membrane lipids, histones associated with DNA, and introns in genes.
D. Circular chromosome, unbranched hydrocarbons in membrane lipids, and one kind of RNA polymerase.
Analyses of genomes have allowed researchers to determine that some cells have very small genomes. If you were asked to predict which organisms are likely to have smaller genomes than others, which option below would be MOST likely?
A.
Bacteria that live in plant hosts are likely to have smaller genomes than those that live in animal hosts as it takes a smaller variety of metabolic processes to survive in an animal host.
B.
Although less is known about Archaea than about Bacteria as fewer species have been studied, it is likely that Archaea have smaller genomes on average than Bacteria as they have fewer metabolic needs.
C.
Bacteria that are endosymbionts, living within a host, can survive with smaller genomes than free-living Bacteria because they can rely on their host for many of their needs.
D.
Protists generally have had smaller genomes than Bacteria because Bacteria have such large amounts of noncoding DNA.
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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