Prescott's Microbiology
11th Edition
ISBN: 9781260211887
Author: WILLEY, Sandman, Wood
Publisher: McGraw Hill
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Chapter 21, Problem 2AL
Compare the structural and functional differences between chlorosomes and thylakoid membranes. Do you think this is an example of convergent evolution—two structures evolving separately to fulfill the same function, or divergent evolution—two structures that arose from a single ancestor but adapted to meet the particular needs of the organism that bears them? What other data would you need (apart from structure and function) to answer this question?
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Students have asked these similar questions
In lecture, we discussed the endosymbiont theory that describes the evolutionary
origins of mitochondria and chloroplast. A few scientists think that peroxisomes also
have an endosymbiotic evolutionary origin, although most scientists disagree with
this hypothesis. Which of the following hypothetical discoveries would provide
support for the hypothesis that peroxisomes evolved from bacteria?
Discovering that eukaryotic cells cannot live without peroxisomes.
All of these hypothetical discoveries would provide support for the hypothesis
that peroxisomes have an endosymbiotic evolutionary origin.
Identifying the presence of DNA within peroxisomes.
Determining that the majority of proteins in peroxisomes have eukaryotic origin.
Chloroplast DNA (cpDNA) and the DNA of free-living photosynthesizing bacteria called
cyanobacteria have been found to share a high number of similarities.
Which of the following claims best supports this finding?
A Chloroplasts act as a reserve for some of the extra cpDNA of the cell.
B
с
D
Chloroplasts are believed to have originated from an endosymbiosis event.
Chloroplasts have the capacity to exist as free-living bacteria outside of the cell.
Chloroplasts and cyanobacteria evolved independently.
Which of the following observations constitutes evidence that mitochondria evolved before chloroplasts?
Mitochondria are aerobic. Chloroplasts are photosynthetic.
Aerobic bacteria evolved before photosynthetic bacteria (cyanobacteria).
Some protists have separately evolved their own plastids (chloroplast-like structures) through endosymbiosis of cyanobacteria, or even through endosymbiosis of photosynthetic protists.
All Eukaryotes have mitochondria; only a subset of Eukaryotes have chloroplasts.
Chapter 21 Solutions
Prescott's Microbiology
Ch. 21.3 - In what ways are members of Aquifex and Thermotoga...Ch. 21.3 - Prob. 2CCCh. 21.3 - Design an experiment designed to explore the role...Ch. 21.3 - Explain the relationship between genome size and...Ch. 21.4 - Which of the phototrophs discussed perform...Ch. 21.4 - Prob. 1.2CCCh. 21.4 - Compare the capacity of green nonsulfur...Ch. 21.4 - Why do you think NH3 is converted to the amino...Ch. 21.4 - Prob. 2.1CCCh. 21.4 - Prob. 2.2CC
Ch. 21.4 - Prob. 2.3CCCh. 21.4 - Describe how a vegetative cell, a heterocyst, and...Ch. 21.4 - Prob. 2.5CCCh. 21.4 - Prob. 2.6CCCh. 21.5 - Prob. 1MICh. 21.5 - Prob. 2MICh. 21.5 - Prob. 1CCCh. 21.5 - Prob. 2CCCh. 21.5 - What might have been some of the culture...Ch. 21.5 - Prob. 4CCCh. 21.5 - Prob. 5CCCh. 21.7 - Prob. 1MICh. 21.8 - Prob. 1CCCh. 21.8 - Prob. 2CCCh. 21.8 - Prob. 3CCCh. 21.8 - Why are cytophagas ecologically important?Ch. 21.8 - Prob. 5CCCh. 21 - Prob. 1RCCh. 21 - Prob. 2RCCh. 21 - Prob. 3RCCh. 21 - Prob. 4RCCh. 21 - Prob. 5RCCh. 21 - Prob. 6RCCh. 21 - Prob. 7RCCh. 21 - The cyanobacterium Anabaena grows well in liquid...Ch. 21 - Compare the structural and functional differences...Ch. 21 - Prob. 3ALCh. 21 - Prob. 4ALCh. 21 - Prob. 5AL
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