Campbell Biology (10th Edition)
10th Edition
ISBN: 9780321775658
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Chapter 26, Problem 26.5CR
Summary Introduction
To describe: The assumptions and limitations of the molecular clock.
Concept introduction: It is important to understand the relationship among organisms to explore their evolutionary history. Some genes evolve at a constant rate which will be helpful to get evolutionary information. However, a gene can evolve at different rates depending on the environment they live. The molecular clock is an approach to measure the time of evolutionary change. The calculation of a molecular clock of a gene can be possible through study of fossil records and plotting the evolution rate taken by a gene. The evolution time point will be represented by genetic differences in terms of nucleotides, codons or amino acids.
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Chapter 26 Solutions
Campbell Biology (10th Edition)
Ch. 26.1 - VISUAL SKILLS: Which levels of the classification...Ch. 26.1 - Prob. 2CCCh. 26.1 - Prob. 3CCCh. 26.2 - Decide whether each of the following pairs of...Ch. 26.2 - Prob. 2CCCh. 26.3 - Prob. 1CCCh. 26.3 - Prob. 2CCCh. 26.3 - WHAT IF? Draw a phylogenetic tree that includes...Ch. 26.4 - Explain how comparing proteins of two species can...Ch. 26.4 - WHAT IF? Suppose gene A is orthologous in species...
Ch. 26.4 - Prob. 3CCCh. 26.5 - What is a molecular clock? What assumption...Ch. 26.5 - Prob. 2CCCh. 26.5 - WHAT IF? Suppose a molecular dock dates the...Ch. 26.6 - Why is the kingdom Monera no longer considered a...Ch. 26.6 - Prob. 2CCCh. 26.6 - Prob. 3CCCh. 26 - Humans and chimpanzees are sister species. Explain...Ch. 26 - Why is it necessary to distinguish homology from...Ch. 26 - Prob. 26.3CRCh. 26 - When reconstructing phylogenies, is it more useful...Ch. 26 - Prob. 26.5CRCh. 26 - Prob. 26.6CRCh. 26 - In a comparison of birds and mammals, the...Ch. 26 - To appiy parsimony to constructing a phylogenetic...Ch. 26 - VISUAL SKILLS In Figure 26.4, which similarly...Ch. 26 - Three living species X, Y, and Z share a common...Ch. 26 - Prob. 5TYUCh. 26 - If you were using cladistics to build a...Ch. 26 - VISUAL SKILLS The relative lengths of the frog and...Ch. 26 - EVOLUTION CONNECTION Darwin suggested looking at a...Ch. 26 - SCIENTIFIC INQUIRY DRAW IT (a) Draw a...Ch. 26 - WRITE ABOUT A THEME: INFORMATION In a Short essay...Ch. 26 - SYNTHESIZE YOUR KNOWLEDGE This West Indian manatee...
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- What is the molecular clock?arrow_forwardOutline the levels of biological organization. What is the difference between the reductionist approach to biology and the systems approach? What are the strengths and weaknesses of each?arrow_forwardTo apply: In biological terms, determine the most significant event in the history of life.arrow_forward
- Give typing answer with explanation and conclusion What are the similarities and differences between convergent evolution and divergent evolution and an example of each?arrow_forwardExplain briefly the theory that suggests that: Life evolved from chemical substances present in the environment. (If possible answer should be in accordance with NCERT Biology).arrow_forwardWrite about the development of molecular clocks ?arrow_forward
- Explain how organisms develop adaptations.arrow_forwardName: I can: LS1-1: Construct an explanation based on evidence for how the structure of DNA determines the structure of proteins which carry out the essential functions of life through systems of specialized cells. LS1-2: Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms. Period: Date: 1.16 Final Explanation: How does a single cell develop into a complex, multicellular organism? Use drawings, diagrams, and writing to explain how a single cell becomes multiple cells, and eventually a complex organism with specialized tissues and organs. o Include Zoom-ins to the cellular and molecular scales. O Include written explanations of your model on the back of this sheet. LS1-4: Use a model to illustrate the role of cellular division (mitosis) and differentiation in producing and maintaining complex organisms. Make sure to include the following: de ere How do organisms make new cells? When DNA…arrow_forwardConsider the concept of evolution. Give some reasons why it is impossible to evolve perfect organisms through this process.arrow_forward
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