Biological Science
5th Edition
ISBN: 9780321743671
Author: Scott Freeman
Publisher: PEARSON
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Chapter 25, Problem 7TYU
Some biologists summarize evolution by natural selection with the phrase “mutation proposes, selection disposes.” Mutation is a process that creates heritable variation. Explain what the phrase means.
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Students have asked these similar questions
Discuss the significance of mutations and explain the role of the environment in the evolutionary process. (Hint: Consider Lenski's study and what is demonstrated. Do not re-tell Lenski’s study)
Which one of the following statements best describes the difference between mutation
and substitution in a population?
Mutation is the origin of a new allele in an individual organism, and substitution is the
evolutionary replacement of one allele by another.
Mutation is the origin of a deleterious allele, and substitution is the increase in frequency of an
advantageous allele by positive selection.
Mutation is change in the DNA sequence within a functional gene, and substitution involves
nucleotide changes in noncoding regions of the genome.
In your group, consider the following statement: "Mutations are random, natural selection is not." What does that statement mean?
Chapter 25 Solutions
Biological Science
Ch. 25 - True or false? Some trails are considered...Ch. 25 - CAUTION Why does the presence of extinct forms and...Ch. 25 - 3. Trails that are derived from a common ancestor,...Ch. 25 - How can biological fitness be estimated? a....Ch. 25 - 5. CAUTION According to data presented in this...Ch. 25 - Some biologists summarize evolution by natural...Ch. 25 - Prob. 9TYUCh. 25 - 9. The average height of humans in industrialized...Ch. 25 - Prob. 16TYPSSCh. 25 - Prob. 3TYK
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- Review darwin's theory of natural selection. Write a paragraph reflection explaining a) what you learned from the evidence of revolution and b.) The connections you made with what you learn about darwin's theory of natural selection and how meet mutations play an important role in the natural selection.arrow_forwardThe raw material for evolution is random mutation. Discuss whether or not you view evolution as a random process.arrow_forwardGenetic variation is the product of completely random events, but acting upon this randomness is a very nonrandom process called natural selection. Explain or give an example.arrow_forward
- Describe the signiicance of mutations in terms of evolution.arrow_forwardDescribe the four basic causes of evolution: natural selection, mutation, genetic drift, and gene flowarrow_forwardBlack lava rocks only appeared in the desert about 1000 years ago. If the first dark-colored rock pocket mouse had a 10% advantage, about how long would it have taken for nearly all of them to have dark-colored fur? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a 10,000 years. 1000 years. 100 years. It depends on how fast new mutations occur. This cannot be estimated because evolution is random. Fullscreenarrow_forward
- Briefly discuss the differences in how a selectionist (one that believes that Natural Selection is a strong evolutionary force) and a neutralist (one that believes that genetic drift is a strong evolutionary force) views the following: molecular clock, evolution of coding sequences, evolution of "pseudogenes".arrow_forwardExplain the reasoning behind the statement “Evolution is not goal oriented.”arrow_forwardWhat is an adaptation in the context of evolution? A heritable trait that was favored by natural selection. choose one of the following. A random genetic mutation that causes a new trait in a population. The ability of an individual to adjust to their environment as it changes..arrow_forward
- Discuss at least two reasons why we cannot consider evolution by natural selection progressive.arrow_forwardCompare and contrast the neutral theory of evolution and the Darwinian (i.e., selectionist) theory of evolution. Explain why the neutral theory of evolution is sometimes called non-Darwinian evolution.arrow_forwardWhich statement about genome evolution is false? Mutations at the ends of introns are less likely than in the middle of an intron. Synonymous mutations rates are much higher than nonsynonymous mutation rates. Psuedogenes show high rates of mutations. Comparison of the mutational change in a specific gene can be used as a molecular clock to date evolutionary events between species. Evolution in a gene sequence will occur the fastest in regions that have the greatest effect on function.arrow_forward
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