Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 4.1, Problem 1CC
What properties of deep-sea vents made them suitable for the prebiotic synthesis of molecules?
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Were any sampling sites devoid of life? What were those sites like? Could microbes have been present at those sites and not detected? Why or why not?
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1) What do the banded formations in marine sediments indicate?
A. Early cyanobacteria probably were producing oxygen when the sediment was deposited.
B. Purple sulfur bacteria were the dominant life form in the seas during that time.
D. The pH value of the early seas was quite low due to the excretion of organic acids from the fermentation by prokaryotes.
C. The early atmosphere was very reducing.
2) Which of the following is not evidence that chloroplasts and mitochondria originated as prokaryotic endosymbionts of larger cells?
A. They contain circular DNA molecules not associated with proteins.
B. Their membranes have enzymes and transport systems that resemble those found on the plasma membranes of prokaryotes.
D. Their ribosomal RNA is more similar to that of eubacteria than to the RNA of ribosomes in the eukaryotic cytoplasm.
C. They contain their own genome and produce all their own…
Chapter 4 Solutions
Biology
Ch. 4.1 - What properties of deep-sea vents made them...Ch. 4.1 - Which protobiont seems most similar to todays...Ch. 4.1 - Core Skill: Connections Look back at Figure 3.11....Ch. 4.1 - Prob. 3CCCh. 4.2 - Prob. 1CCCh. 4.2 - Prob. 2CCCh. 4.3 - Prob. 1CSCh. 4.3 - Prob. 1CCCh. 4.3 - Prob. 2CSCh. 4.4 - Prob. 1CS
Ch. 4.4 - Describe the type of movements that occur between...Ch. 4.4 - Prob. 2CSCh. 4.5 - Prob. 1CCCh. 4.5 - Prob. 1CSCh. 4.5 - If we consider the Golgi apparatus as three...Ch. 4.5 - The Nucleus and Endomembrane System Experimental...Ch. 4.5 - Prob. 2EQCh. 4.5 - Prob. 3EQCh. 4.5 - Prob. 3CCCh. 4.6 - Prob. 1CCCh. 4.6 - Core Skill: Connections Look ahead to Figure...Ch. 4.7 - Prob. 1CCCh. 4.7 - Prob. 2CCCh. 4 - The cell theory states that a. all living things...Ch. 4 - Prob. 2TYCh. 4 - Prob. 3TYCh. 4 - Prob. 4TYCh. 4 - Each of the following is part of the endomembrane...Ch. 4 - Prob. 6TYCh. 4 - Functions of the smooth endoplasmic reticulum...Ch. 4 - Prob. 8TYCh. 4 - Prob. 9TYCh. 4 - Which of the following observations would not be...Ch. 4 - What are the four stages that led to the origin of...Ch. 4 - Explain how motor proteins and cytoskeletal...Ch. 4 - Prob. 3CQCh. 4 - Discuss the roles of the genome and proteome in...Ch. 4 - Prob. 2COQ
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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
- Why was it believed that life began in the seas and not in land or air?arrow_forwardWhy can’t marine organisms use the nitrogen gas dissolved in seawater?arrow_forwardHow does the ocean remove carbon dioxide from Earth’s atmosphere? What role do tiny marine organisms, such as foraminifera, play in the removal of carbon dioxide?arrow_forward
- How do hydrothermal vents support thriving communities of microbes, clams, and tube worms?arrow_forwardWhat kind of marine life exists at the central pacific ocean in hawaii (pelagic zone)? And can the "telescope" fish be found there?arrow_forwardHow did the appearance of Cyanobacteria change the atmosphere of the ancient earth ?arrow_forward
- How the evolution of oxygen was involved in the initial evolution of terrestrial life?arrow_forwardThe deep-sea floor has been considered as a potential site for the disposal of toxic and radioactive wastes. What questions about the biology, geol-ogy, and chemistry of the deep-sea environment do you think should be answered before such plans are approved?arrow_forwardUsing the analogy of a one-hour countdown timer, when did prokaryotes originate? When did the colonization of land occur?arrow_forward
- How does the iron–sulfur world hypothesis differ from the prebiotic soup hypothesis? What do these hypotheses have in common?arrow_forwardScientist have determined that the early Earth had no free oxygen anywhere. Briefly explain what evidence in the rock layers that scientists found to prove when the early conditions on earth had free oxygen in the atmosphere.arrow_forward1) why is nitrogen very much abundant in the atmosphere as compared to oxygen which support plant and animal life? 2) Explain what causes the mantle to flow?arrow_forward
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