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 7IQ
Summary Introduction
To identify: The domains a, b, and c, and to label the two major episodes d and e of horizontal gene transfer.
Introduction: Taxonomy is the branch of biology that names and classifies all the organisms. Historically, taxonomists classified the diversity of life into two kingdoms. Later, Whittaker divided the diversity of life into five kingdoms.
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Define, diagram & compare the 3 mechanisms of Horizontal Gene Transfer in prokaryotes. In each case, what must happen for the exchanged DNA to be stably inherited?
Why do you suppose that horizontal gene transfer is more prevalent in single-celled organisms than in multicellular organisms?
What is horizontal gene transfer and how can this process potentially change how we view relatedness among the three Domains? Provide an example of a species with characteristics that results from horizontal gene transfer.
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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- How would the process of the double holiday junction model differ if identical DNA molecules were used in place of homologous ones? A.) Crossing over would NEVER be observed B.) No change the entire process would be the same C.) Gene conversion would never occur D.) Crossing over would ALWAYS be observed do not copy from othersarrow_forwardDefine horizontal gene transfer in bacteria and explain 3 mechanisms by which thiscan take place in bacteria (Hint: we talked about 4 mechanisms in the lecture,arrow_forwardWhat are the mechanisms by which prokaryotes exchange genetic material via horizontal gene transfer? Describe the three processes.arrow_forward
- The diagram below represents single-celled organism A dividing by mitosis to form cells B andC. B cکړ Cells A, B, and C all produced protein X. What can best be inferred from this observation? A) The gene to produce protein X was passed from cell A to cells B and C. B) Cells A, B, and C ingested food containing the gene to produce protein X. C) The gene for protein X is found in single-celled organisms, only. D) Protein X is found in all organisms.arrow_forwardUnder the endosymbiotic theory for the origin of the eukaryotic cell. The ancestor of mitochondria and chloroplasts original became part of mutualism with a larger host cell. Which of the following best explains this mutualism? A) The mitochondria and chloroplasts provided specialized reproduction as part of the proto-germ line while the larger host cell provided energy for growth and reproduction. B) The mitochondria and chloroplasts provided gene products that could be used by the larger host cell for improved parasitization. C) The mitochondria and chloroplasts provided molecular energy in return for protection by the larger host cell. D) The mitochondria and chloroplasts produce toxins that the larger cell utilized to defend itself from other cells mutually increasing the defense of all those involved.arrow_forwardVariations in chromosome structure are important for which of the following reason(s)?Question 5 options: A) evolution of new species B) may result in the production of abnormal offspring C) may alter the phenotype of an organism D) all of the answers are correctarrow_forward
- find an example of a set of genes that have been horizontally gene transferred between bacteria or archaea. Which organisms are the genes transferred between? Explain the set of genes that were transferred. Include what they are for and what the advantage to sharing those genes are.What do the organisms use the genes for?Which organisms the transfer happened between?What might be the advantage be to share the genes with other organisms?arrow_forwardCompare genome size, gene number, and gene density (a) in the threedomains and (b) among eukaryotes.arrow_forwardchoose one answerarrow_forward
- Researchers systematically replaced 414 essential genes in yeast with similar genes from humans. Almost half of these transplants (47%) were successful: cells with the humanized gene were able to function and grow. What does this observation tell us about differences between yeast and humans? How might this information be used?arrow_forwardA group of genetics students mix two auxotrophic strains of bacteria: one is leu+ trp+ his− met− and the other is leu− trp− his+ met+. After mixing the two strains, they plate the bacteria on minimal medium and observe a few prototrophic colonies (leu+ trp+ his+ met+). They assume that some gene transfer has taken place between the two strains. How can they determine whether the transfer of genes is due to conjugation, transduction, or transformation?arrow_forwardVolvox carteri, an volvocine alga, has approximately 2000 somatic cells and only 16 reproductive or germ line cells. The observation that multicellular individuals, like Volvox, have a much smaller subset of germ line cells compared to somatic cells appears to be general rule. Which of the following is the best evolutionary explanation for why this is the case? A) Organisms can biologically only contain a small number of germ line cells as they are always larger than somatic cells. B) Multicellular individuals with a germ line vs. somatic cell line differentiation only evolved a single time, thus all members of this lineage share the same scheme of more soma cells with a much smaller subset of germ line cells. C) Having a smaller subset of reproductive cells helps reduce the likelihood of cheating from evolving, which in turns prevents the collapse of the multicellular individual system. D) None of the above.arrow_forward
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