Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 25.2, Problem 2SB
Summary Introduction
To review:
The evidence that suggests that RNA (ribonucleic acid)molecules may have functioned as molecular replicators in early protocells.
Introduction:
Protocells are the first formed cells. RNA is a
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In 40 words or fewer, explain why we think that RNA, and not DNA, was the hereditary material in the first protocell.
What factors could be responsible for the size differences among modern vertebrate genomes?
How did the researchers use the DNA of living sponges to make conclusions about events occurring hundreds of millions of years ago?
Chapter 25 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 25.1 - Why is the reducing nature of early Earths...Ch. 25.1 - Prob. 2SBCh. 25.2 - Prob. 1SBCh. 25.2 - Prob. 2SBCh. 25.2 - Prob. 3SBCh. 25.3 - Prob. 1SBCh. 25 - Prob. 1TYKCh. 25 - Which of the following is not a characteristic of...Ch. 25 - Prob. 3TYKCh. 25 - According to the OparinHaldane hypothesis, the...
Ch. 25 - Prob. 5TYKCh. 25 - Prob. 6TYKCh. 25 - In a population of self-replicating RNA molecules,...Ch. 25 - Prob. 8TYKCh. 25 - Prob. 9TYKCh. 25 - Prob. 10TYKCh. 25 - Prob. 11TYKCh. 25 - Prob. 12TYKCh. 25 - Prob. 13TYKCh. 25 - Prob. 14TYKCh. 25 - Prob. 15TYKCh. 25 - Prob. 16TYKCh. 25 - Prob. 1ITDCh. 25 - Prob. 2ITDCh. 25 - Prob. 3ITD
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How did the presence of molecular oxygen in the atmosphere affect early life?
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Which of the following is an accurate point that supports the idea that the earliest protocells relied first on RNA (not DNA) as inherited information?
A. RNA is composed of lipids, and lipids were present on early Earth before the nucleotides that compose DNA were
B. RNA is a monomer (unlike DNA), so it is simpler and more likely to have been used by these simple protocells
C. DNA would have been too large to fit into the small protocells, but RNA was small enough to fit
D. RNA can serve dual roles as both genetic information storage and an enzyme (but DNA cannot do both)
..
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What is a hominin?
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In what way was the evolution of eukaryotic cells linked to the increase in the oxygen concentration in the atmosphere that occurred during the Precambrian?
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Do plants and animals have a common multicellular ancestor?
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Why did hominins evolve from an apelike primate?
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