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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Describe the properties of laboratory-produced protocells.
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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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- select the correct options: A) For organisms that diverged >74 mya, ignore 3rd base positions within codons because they will offer little phylogenetic information for organisms. B) use different parts ofthe genome to estimate different parts of a phylogeny C) Use only 1st base positions within codons because they increase rapidly at first, then level off as result of single subsitituions at the same sites D) Use slowly evolvong sites in the squecne, such as 2nd base positions within codonsfor analyzing the oldest relationships among organisms.arrow_forwardIn bacteria, split genes are extremely rare. Have introns been inserted into genes in the evolution of higher organisms?arrow_forwardDo plants and animals have a common multicellular ancestor?arrow_forward
- 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) ..arrow_forwardIn a molecular phylogeny what can serve as a synapomorphy? a.) amino acids b.) homoplasy c.) None of the answers are correct d.) insertions e.) orthologsarrow_forwardan actin gene in humans is 92 identical to the homologous actin gene in mice. An actin gene in human is 80% identical to the homologous gene in yeast. what does this say about how long ago those organism has a common ancestor?arrow_forward
- With two specific examples, explain why phylogenetics is a useful scientific tool for studying Organismal biology?arrow_forwardGeneticists have determined the amount of DNA, the number of different genes, and the size of the cell/nucleus in a wide variety of model organisms. as we move up the phylogenetic scale, the amount of DNA/cell increases much more rapidly than does the volume in which that DNA must be packaged. How do higher organisms package their DNA in the interphase cell?arrow_forwardHow does the composite tree of eukaryotes differ from theribosomal RNA–based tree?arrow_forward
- If you are to compare the genetic sequences between monkeys and fungi, what molecular sequence are you going to use? Why? How about comparing genetic sequences of monkeys to humans, what genetic sequence will you use? Provide an explanation.arrow_forwardGive typing answer with explanation and conclusion In thinking about the clinical application of phylogenetics, discuss the role of phylogenetics in these areas. a) Predictions of drug resistance b) Identifying the origin of an outbreak c)Predicting the spread of a diseasearrow_forwardWhat is a hominid?arrow_forward
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