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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The theory of the endosymbiotic origin of mitochondria and chloroplasts was first proposed by the biologist Lynn
Which of the following statements provides support for the theory of endosymbiosis?
1. All the genes found in chloroplasts are homologous to genes found in the nucleus of eukaryotic cell.
2. Mitochondria contain their own ribosomes.
3. Proteins need a targeting sequence to be imported into a chloroplast.
4. Mitochondria can generate a proton gradient and harness it to synthesize ATP.
O A. 1, 2 and 3
B. 1 and 3
C. 2 and 4
D. 4 only
E. All of 1, 2, 3 and 4 are correct.
The endosymbiotic hypothesis for the origin of chloroplasts from gram-negative prokaryotes is supported by all of the following lines of evidence except:
the presence of enzymes for the light-dependent and the dark reactions of photosynthesis
the presence of circular DNA resembling that of photosynthetic eubacteria
the presence of mRNA, tRNA, and rRNA similar to that of the cyanobacteria
their use of mitosis rather than binary fission during cell division
the presence of 70s ribosomes, consisting of 30s and 50s ribosomal subunits
Giardia is a protozoan parasite that lacks mitochondria. Based on the figure below, what could be the explanation for this. Explain your reasoning.
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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- Explain 5 pieces of evidence that support the endosymbiotic theory of origin to the energy organelles within Eukaryotes (i.e.mitochondria and chloroplasts).arrow_forwardWhat evidence supports the hypothesis that mitochondria preceded plastids in the evolution of Eukaryotes cells?arrow_forwardWhat evidence supports the hypothesis that mitochondriapreceded plastids in the evolution of eukaryotic cells?arrow_forward
- What role did the increase of atmospheric oxygen by prokaryotes play in the development of the endosymbiotic relationship between protoeukaryotes and mitochondria?arrow_forward1. Why was the great oxygenation event important for mitochondrial development? a) In your own words, define symbiotic. 2. Chloroplasts and mitochondria both contain a circular DNA chromosome, and ribosomes. Why does this evidence support the theory of endosymbiosis as the mechanism for the origin of eukaryotic cells? a) Today, could mitochondria live independently of their eukaryotic cell host? Give two pieces of evidence to support your answer.arrow_forwardA scientist discovered a new group of unicellular organisms that lack mitochondria but possess an organelle related to the endoplasmic reticulum and is involved in energy production. The scientist hypothesizes that this organelle might be a missing link in the evolution of mitochondria. A) Do you agree with this hypothesis? Explain. B) Based on the available evidence, what is the most likely hypothesis for the origin of mitochondria? Provide four pieces of evidence to support this theory and justify why they are valid.arrow_forward
- Diagram the endosymbiotic theory of the origin of mitochondria and chloroplastsarrow_forwardSelect 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_forwarda) Describe some characteristics and differences between prokaryotic and eukaryotic cells.b) How do the three domains of life differ from one another?c) Two of the organelles in eukaryotes, the mitochondrion and the chloroplast are believed to haveoriginated through a process of symbiosis. Discuss some of the theories of the origins ofmitochondria and chloroplastsarrow_forward
- What is the endosymbiotic hypothesis about the origin of mitochondria? What are the molecular facts that support the hypothesis? To which other cellular organelles can the hypothesis also be applied?arrow_forwardDefine the endosymbiotic theory. Explain how mitochondria and chloroplasts evolved by endosymbiosis. Explain 4 pieces of evidence for the Endosymbiotic Theory.arrow_forwardList three sources of evidence that support theendosymbiotic theory of organelle evolution.arrow_forward
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