IA MODIFIED MASTERING BIOLOGY WITH E TEX
12th Edition
ISBN: 9780136781752
Author: Urry
Publisher: PEARSON
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Textbook Question
Chapter 6, Problem 6.5CR
What does the endosymbiont theory propose us the origin for mitochondria and chloroplasts? Explain.
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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.
1. 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.
What evidence supports the hypothesis that mitochondriapreceded plastids in the evolution of eukaryotic cells?
Chapter 6 Solutions
IA MODIFIED MASTERING BIOLOGY WITH E TEX
Ch. 6.1 - Prob. 1CCCh. 6.1 - Prob. 2CCCh. 6.2 - Briefly describe the structure and function of the...Ch. 6.2 - DRAW IT Draw a simplified elongated cell that...Ch. 6.3 - What role do ribosomes play in carrying out...Ch. 6.3 - Describe the molecular composition of nucleoli and...Ch. 6.3 - Prob. 3CCCh. 6.4 - Describe the structural and functional...Ch. 6.4 - Describe how transport vesicles integrate the...Ch. 6.4 - WHAT IF? Imagine a protein that functions in the...
Ch. 6.5 - Describe two characteristics shared by...Ch. 6.5 - Prob. 2CCCh. 6.5 - Prob. 3CCCh. 6.6 - Prob. 1CCCh. 6.6 - WHAT IF? Males afflicted with Kartagener's...Ch. 6.7 - In what way are the cells of plants and animals...Ch. 6.7 - Prob. 2CCCh. 6.7 - MAKE CONNECTIONS The polypeptide chain that makes...Ch. 6.8 - Prob. 1CCCh. 6 - Prob. 6.1CRCh. 6 - Explain how the compartmental organization of a...Ch. 6 - Describe the relationship between the nucleus and...Ch. 6 - Describe the key role played by transport vesicles...Ch. 6 - What does the endosymbiont theory propose us the...Ch. 6 - Describe the role of motor proteins inside the...Ch. 6 - Prob. 6.7CRCh. 6 - When a cell ingests a bacterium, what role does...Ch. 6 - Prob. 1TYUCh. 6 - Prob. 2TYUCh. 6 - Which of the following is present in a prokaryotic...Ch. 6 - Prob. 4TYUCh. 6 - Which cell would be best for studying lysosomes?...Ch. 6 - Prob. 6TYUCh. 6 - EVOLUTION CONNECTION (a) What cell structures best...Ch. 6 - SCIENTIFIC INQUIRY Imagine protein X, destined to...Ch. 6 - WRITE ABOUT A THEME: ORGANIZATION Considering some...Ch. 6 - SYNTHESIZE YOUR KNOWLEDGE The cells in this SEM...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Scientists explain the existence of mitochondria and chloroplasts with the endosymbiotic hypothesis. What is the endosymbiotic hypothesis? Give two pieces of evidence for it.arrow_forwardAccording to the endosymbiotic theory of the origin of eukaryotic cells, how did chloroplasts originate? -by tertiary endosymbiosis -through secondary endosymbiosis -from the nuclear envelope folding outward and forming mitochondrial membranes -from infoldings of the plasma membrane, coupled with mutations of genes for oxygen-using metabolism -through primary endosymbiosisarrow_forwardWhat evidence supports the hypothesis that mitochondria preceded plastids in the evolution of Eukaryotes cells?arrow_forward
- Biologists think that endosymbiosis gave rise to mitochondriabefore plastids partly because(A) the products of photosynthesis could not be metabolizedwithout mitochondrial enzymes.(B) all eukaryotes have mitochondria (or their remnants),whereas many eukaryotes do not have plastids.(C) mitochondrial DNA is less similar to prokaryotic DNA thanis plastid DNA.(D) without mitochondrial CO2 production, photosynthesiscould not occur.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_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
- Describe the features of mitochondria and chloroplasts that support the endosymbiotic theory.arrow_forwardWhat evidence supports the idea that the mitochondrion andchloroplast were once free-living members of the domainBacteria?arrow_forwardWhat is the evolutionary origin of chloroplasts?arrow_forward
- Giardia is a protozoan parasite that lacks mitochondria. Based on the figure below, what could be the explanation for this. Explain your reasoning.arrow_forwardName and describe the idea that explains how mitochondria and chloroplasts are thought to have originated in eukaryotic cells.arrow_forwardThe endosymbiont theory states that mitochondria andchloroplasts evolved from symbiotic relationshipsestablished between bacteria-like cells and theprecursors of eukaryotic cells that engulfed them on what basisarrow_forward
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