Biology: Concepts and Investigations
5th Edition
ISBN: 9781260259049
Author: Hoefnagels
Publisher: MCG
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Chapter 15.2, Problem 2MC
Summary Introduction
To determine:
The evidence that mitochondria and chloroplasts descended from simpler cells engulfed long ago.
Concept introduction:
Endosymbiont theory proposes that both mitochondria and chloroplasts were once free-living bacteria that were engulfed by ancient bacteria. The aerobic bacteria became mitochondria of the today’s eukaryotic cells while the photosynthetic cyanobacteria became chloroplasts of today’s plant cells.
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What is the evidence that mitochondria and chloroplasts descendfrom simpler cells engulfed long ago?
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Scientists explain the existence of mitochondria and chloroplasts with the endosymbiotic hypothesis. What is the endosymbiotic hypothesis? Give two pieces of evidence for it.
Chapter 15 Solutions
Biology: Concepts and Investigations
Ch. 15.1 - How were conditions on Earth before life began...Ch. 15.1 - Prob. 2MCCh. 15.1 - Prob. 3MCCh. 15.1 - Prob. 4MCCh. 15.2 - How might the endoplasmic reticulum, nuclear...Ch. 15.2 - Prob. 2MCCh. 15.2 - Prob. 3MCCh. 15.3 - Prob. 1MCCh. 15.3 - What types of organisms flourished in the...Ch. 15.3 - How did Palaeozoic life diversify during the...
Ch. 15.3 - Prob. 4MCCh. 15.3 - Prob. 5MCCh. 15.3 - Prob. 6MCCh. 15.4 - Prob. 1MCCh. 15.4 - Prob. 2MCCh. 15.4 - Prob. 3MCCh. 15.4 - Prob. 4MCCh. 15.5 - Prob. 1MCCh. 15.5 - Prob. 2MCCh. 15 - Place the following events in Earths history in...Ch. 15 - Prob. 2MCQCh. 15 - Photosynthetic cells affected early Earth by a....Ch. 15 - Prob. 4MCQCh. 15 - Prob. 5MCQCh. 15 - Prob. 6MCQCh. 15 - Why was the Mesozoic era extinction significant to...Ch. 15 - Primates share all of the following...Ch. 15 - Prob. 9MCQCh. 15 - DNA evidence suggests that modern humans a. share...Ch. 15 - Explain how the origin of self-replicating...Ch. 15 - Prob. 2WIOCh. 15 - Review the structures of nucleic acids and...Ch. 15 - Prob. 4WIOCh. 15 - The amoeba Pelomyxa palustris is a single-celled...Ch. 15 - Prob. 6WIOCh. 15 - Distinguish among the terms primate, hominid,...Ch. 15 - Prob. 8WIOCh. 15 - Prob. 9WIOCh. 15 - Compare todays changing culture to biological...Ch. 15 - Prob. 11WIOCh. 15 - Prob. 1PITCh. 15 - Refer to figure 15.31 and the chapter content to...Ch. 15 - Refer to figure 15.31 and the chapter content to...
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- It has been suggested that chloroplasts, like mitochondria,evolved from living organisms. What features of the chloroplast suggest that this is true?arrow_forwardIt has been suggested that chloroplasts, like mitochondria, evolved from independent living organisms. What features of the chloroplast suggest that this is true?arrow_forwardHow do scientists know that mitochondria and chloroplasts were likely once free-living prokaryotes? What theory is explained by this evidence?arrow_forward
- If mitochondria originated as proteobacteria and chloroplasts are descended from cyanobacteria, where does the rest of the eukaryotic cell come from?arrow_forwardAccording to the endosymbiotic theory, why did the primitive eukaryotic cell fail to digest the non-photosynthetic prokaryote that later became an energy-producing organelle? Because the engulfed cell provided the host cell with carbon dioxide. Because the host cell was able to survive anaerobic conditions with the engulfed cell alive. Because the engulfed cell allowed the host cell to metabolize glucose. Because the engulfed cell provided the host cell with adenosine triphosphate (ATP).arrow_forwardHow can the hypothesis that asserts that chloroplasts as well as mitochondria were primitive prokaryotes that associated in mutualism with primitive anaerobic eukaryotic cells be corroborated?arrow_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_forwardWhat is the origin of mitochondria and chloroplasts?arrow_forwardChloroplasts and mitochondria are both unusual in that they have double membranes and contain their own set of DNA. Can you think of any explanations for this observation?arrow_forward
- What are mitochondria? What is their structure, function, and where did they come from during evolution?arrow_forwardThere are several lines of evidence that suggest that chloroplasts and mitochondria were once independent organisms. Explain in your own words what that evidence is.arrow_forwardWhat evidence supports that mitochondria and chloroplasts originated from bacteria?arrow_forward
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