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 25, Problem 3IQ
Summary Introduction
To explain: Some evidence that support an endosymbiotic origin or plastids and mitochondria.
Introduction: The endosymbiotic theory is otherwise called as symbiogenesis. It is an evolutionary theory of the origin of the eukaryotic cell from the organism of prokaryotes. In 1905 and 1910, the endosymbiotic theory is articulated by Russian botanist Konstantin Mereschkowski. In 1967, the substantiated and advanced theory with
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What is endosymbiosis and why is it considered to be the source of eukaryotic diversity? Why are we confident this only happened once? What is primary and secondary endosymbiosis? Was there another endosymbiotic event that led to a third lineage? What group of organisms possesses a structure that might suggest this possibility and what is the structure? Why is the structure in question different from the ancestor of other plastids?
What evidence supports the hypothesis that mitochondria preceded plastids in the evolution of Eukaryotes cells?
What evidence supports the hypothesis that mitochondriapreceded plastids in the evolution of eukaryotic cells?
Chapter 25 Solutions
Study Guide for Campbell Biology
Ch. 25 - Why do we say that, for life to have begun, the...Ch. 25 - Prob. 2IQCh. 25 - Prob. 3IQCh. 25 - Prob. 4IQCh. 25 - Prob. 5IQCh. 25 - a. Mammals originated 180 mya but did not change...Ch. 25 - Prob. 7IQCh. 25 - a. According to the model of species selection,...Ch. 25 - Prob. 1SYKCh. 25 - Label the eons, eras, and key events shown on the...
Ch. 25 - Describe three major processes that have...Ch. 25 - Prob. 4SYKCh. 25 - The primitive atmosphere of Earth may have favored...Ch. 25 - Prob. 2TYKCh. 25 - Prob. 3TYKCh. 25 - The half-life of carbon-14 is 5,730 years. A...Ch. 25 - Prob. 5TYKCh. 25 - Prob. 6TYKCh. 25 - Prob. 7TYKCh. 25 - Look back at the Geologic Record in Table 25.1....Ch. 25 - Prob. 9TYKCh. 25 - According to the endosymbiont theory, a. the first...Ch. 25 - Prob. 11TYKCh. 25 - Prob. 12TYKCh. 25 - Prob. 13TYKCh. 25 - Prob. 14TYKCh. 25 - Prob. 15TYKCh. 25 - Prob. 16TYKCh. 25 - Prob. 17TYKCh. 25 - What is meant by the concept of species selection?...
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- DNA sequence data for a diplomonad, a euglenid, a plant, and an unidentified protist suggest that the unidentified species is most closely related to the diplomonad. Further studies reveal that the unknown species has fully functional mitochondria. Based on these data, at what point on the phylogenetic tree in Figure 1 did the mystery protist’s lineage probably diverge from other eukaryote lineages? Explain.arrow_forwardBriefly describe the three taxa involved in the secondary endosymbiosis and the one taxa that lost mitochondria.arrow_forwardWhat role did the increase of atmospheric oxygen by prokaryotes play in the development of the endosymbiotic relationship between protoeukaryotes and mitochondria?arrow_forward
- Select all of the following that provide evidence about the support to the Theory of Endosymbiosis. U U U Chloroplasts and mitochondria have their own DNA Chloroplasts and mitochondria are present in prokaryotic bacteria Chloroplasts and mitochondria are enclosed in a double membrane Chloroplasts and mitochondria divide by a process that closely resembles binary fission The DNA of chloroplasts and mitochondria is very similar to that of other free-living prokaryotesarrow_forwardIs protist dna in a nucleus unicellular or multicellular?According to the phylogeny presented in this chapter which protists are in the same eukaryotic supergroup as plants a) green algae b) dinoflagellates c) red algaed both a and c in a lifecycle with alternation of generations multicellular haploid forms alternate with a unicellular haploid forms b unicellular diploid formsc multicellular haploid forms d) multicellular diploid formsarrow_forwardDefine the endosymbiotic theory. Explain how mitochondria and chloroplasts evolved by endosymbiosis. Explain 4 pieces of evidence for the Endosymbiotic Theory.arrow_forward
- Which of the following pieces of evidence could support the endosymbiotic theory if found to be true? Traces of peptidoglycan in the cytoplasm in eukaryotes Presence of rRNA in eukaryotes Presence of 80S ribosomes in eukaryotes The discovery of a unicellular eukaryotearrow_forwarddescribe a scenario for the evolutionary origin of protist chloroplasts?arrow_forwardIn the late 1960s (and since), Lynn Margulis (and others) provided considerable evidence for the endosymbiotic theory of the origin of various organelles in eukaryotic cells.What is the endosymbiotic theory? Which two eukaryotic organelles were proposed to have arisen as endosymbionts? What evidence did Margulis present to support each organelle as an endosymbiont?arrow_forward
- Briefly describe what endosymbiotic theory is. Describe a few ways in which endosymbiotic theory has changed the way scientists think about the ancestral distinctions among the three domains.arrow_forwardIn the early 1930s, G. F. Gause carried out a series of experiments using two species of ciliated protists (Paramecium), which are single-celled eukaryotic protozoans. The protists were cultured together and separately, with the bacteria being the single food source. The results are shown in the figure below. (a) Based on figure, identify and explain the interaction that is taking place between P. caudatum and P. aurelia. (b) Clam shrimp, a natural predator to P. caudatum, is introduced to the culture containing both P. caudatum and P. aurelia after 24 days. Predict the impact that the clam shrimp will have on the culture and the populations. Justify your prediction.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
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