Campbell Biology in Focus
3rd Edition
ISBN: 9780134710679
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Rebecca Orr
Publisher: PEARSON
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Textbook Question
Chapter 25.1, Problem 2CC
Explain why eukaryotes are said to be “combination” organisms, and summarize the role of endosymbiosis in eukaryotic evolution.
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Describe the evidence that supports the endosymbiotic theory of evolution of eukaryotes.
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Draw a simple cladogram illustrating the relationships among the following: Common ancestor of all organisms, domain Eukarya, domain Bacteria, domain Archaea. To which domain do the organisms informally known as protists belong? To which domain do you belong?
Chapter 25 Solutions
Campbell Biology in Focus
Ch. 25.1 - Describe major events in the evolution of early...Ch. 25.1 - Explain why eukaryotes are said to be combination...Ch. 25.1 - Prob. 3CCCh. 25.2 - Summarize the evidence that choanoflagellates are...Ch. 25.2 - MAKE CONNECTlONS Describe how the origin of...Ch. 25.2 - Prob. 3CCCh. 25.3 - Briefly describe the organisms found in each of...Ch. 25.3 - MAKE CONNECTIONS Review Figures 7.2 and 8.5...Ch. 25.3 - Prob. 3CCCh. 25.3 - Prob. 4CC
Ch. 25.4 - Justify the claim that photosynthetic protists are...Ch. 25.4 - Prob. 2CCCh. 25.4 - Prob. 3CCCh. 25 - The oldest fossil eukaryote that can be resolved...Ch. 25 - Prob. 2TYUCh. 25 - Plastids that are surrounded by more than two...Ch. 25 - Prob. 4TYUCh. 25 - Prob. 5TYUCh. 25 - Based on the phylogenetic tree in Figure 25.10,...Ch. 25 - MAKE CONNECTIONS The bacterium Wolbachia is a...Ch. 25 - FOCUS ON EVOLUTION DRAW IT Medical researchers...Ch. 25 - FOCUS ON INTERACTIONS Organisms interact with each...Ch. 25 - SYNTHESIZE YOUR KNOWLEDGE These micrographs show...
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- make a drawing of a phylogenetic tree that contains all 3 domains of life. The tree should include at least three different animals, two plants, chemoheterotrophic bacteria, photoautotrophic bacteria, chemoheterotrophic archaea, thermophilic archaea and fungi. Identify both primary endosymbiosis events on the tree and draw a line to connect it to the organism that would become the future organelle.arrow_forwardBriefly explain how the eukaryotic cell could have evolved fromprokaryotic ones.arrow_forwardDoes the following phylogenetic tree provide evidence to support or refute the endosymbiosis hypothesis? Briefly explain your choice (1-2 sentences) Bacteria a-Proteobacteria Mitochondria Archaea Eukarya Excavata Discicristata Alveolata Stramenopila Rhizaria Plantae Opisthokonta Amoebozoaarrow_forward
- Explain in which domain you would classify an organism that consists of a single cell with a nucleus.arrow_forwardExplain how molecular systematics and metagenomics have contributed to our understanding of the phylogeny and evolution of prokaryotes.arrow_forwardBriefly describe the idea of Endosymbiosis and how it is associated with the formation of the first Eukaryotic cells.arrow_forward
- The answer to the question of how eukaryotic cells evolved has been suggested in the Endosymbiotic Theory. Provide at least 4 pieces of evidence to support this theory.arrow_forwardThis chapter shows a phylogenetic tree for the three domains of life, which is based on DNA sequence data for rRNA and other genes. Which of the following answers concerning the phylogenetic relationships found within this tree is incorrect? View Available Hint(s)for Part A Euryarcheotes are found in the Archaea Diatoms, Tubulinids, and Euglenozoans belong to the domain Eukarya Forams, Fungi, and Chlamydias belong to the domain Eukarya. Spirochetes belong to the domain Bacteria Ciliates, Red Algae, and Plants belong to the domain Eukarya.arrow_forwardTo explain: The DNA sequence of a modern bacterium which is believed to be descended from endosymbiont which gave rise to mitochondria would be similar to chloroplast, nucleus or mitochondrion.arrow_forward
- Identify four organelles that should be present in the eukaryotic organism and describe the function of each organelle. Correctly relate 3 eukaryotic organelles to prokaryotic function. Defines endosymbiosis and describes 3 observations that support the endosymbiotic theory.arrow_forwardDefine the endosymbiotic theory. Explain how mitochondria and chloroplasts evolved by endosymbiosis. Explain 4 pieces of evidence for the Endosymbiotic Theory.arrow_forwardThe TATA-binding protein (TBP) is thought to be necessary for transcription in all eukaryotic cell nuclei. Studies show that archaea, but not bacteria,have a protein structurally and functionally similar to TBP. What does this similarity suggest regarding the evolution of archaea, bacteria, and eukaryotes? How might knowledge of this similarity affect how systematists classify these organisms?arrow_forward
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