Biology: Concepts and Investigations
5th Edition
ISBN: 9781260259049
Author: Hoefnagels
Publisher: MCG
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Chapter 15, Problem 10WIO
Compare today’s changing culture to biological evolution by means of natural selection. How are they similar? How are they different? Can you think of examples of knowledge, beliefs, and behaviors that were appropriate in one set of conditions but that humans selected against as conditions changed?
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Natural selection and artificial selection or selective breeding can both cause changes in animals and plants. The difference between the two is that natural selection happens naturally, but selective breeding only occurs when humans intervene. Changes in genetic traits have occurred over generations through both natural selection and selective breeding although the occur through different means. What characterizes only artificial selection? Choose all that apply.
A) chickens that lay larger eggs are favored
B) selection increases the chances of surviving
C) selection make a species stronger and fit for survival
D) selection favors the desired characters in the new organisms
Consider the four postulates of natural selection. How have humans manipulated each of these postulates in natural or artificial systems?
How can Darwin's finches explain natural selection and descent with modification? What is another example of natural selection and descent with modification? In both of your answers, you should describe the trait that was selected for/against and why this trait was an advantage/disadvantage. Plus, state how natural selection changed the population over time.
Chapter 15 Solutions
Biology: Concepts and Investigations
Ch. 15.1 - How were conditions on Earth before life began...Ch. 15.1 - Prob. 2MCCh. 15.1 - Prob. 3MCCh. 15.1 - Prob. 4MCCh. 15.2 - How might the endoplasmic reticulum, nuclear...Ch. 15.2 - Prob. 2MCCh. 15.2 - Prob. 3MCCh. 15.3 - Prob. 1MCCh. 15.3 - What types of organisms flourished in the...Ch. 15.3 - How did Palaeozoic life diversify during the...
Ch. 15.3 - Prob. 4MCCh. 15.3 - Prob. 5MCCh. 15.3 - Prob. 6MCCh. 15.4 - Prob. 1MCCh. 15.4 - Prob. 2MCCh. 15.4 - Prob. 3MCCh. 15.4 - Prob. 4MCCh. 15.5 - Prob. 1MCCh. 15.5 - Prob. 2MCCh. 15 - Place the following events in Earths history in...Ch. 15 - Prob. 2MCQCh. 15 - Photosynthetic cells affected early Earth by a....Ch. 15 - Prob. 4MCQCh. 15 - Prob. 5MCQCh. 15 - Prob. 6MCQCh. 15 - Why was the Mesozoic era extinction significant to...Ch. 15 - Primates share all of the following...Ch. 15 - Prob. 9MCQCh. 15 - DNA evidence suggests that modern humans a. share...Ch. 15 - Explain how the origin of self-replicating...Ch. 15 - Prob. 2WIOCh. 15 - Review the structures of nucleic acids and...Ch. 15 - Prob. 4WIOCh. 15 - The amoeba Pelomyxa palustris is a single-celled...Ch. 15 - Prob. 6WIOCh. 15 - Distinguish among the terms primate, hominid,...Ch. 15 - Prob. 8WIOCh. 15 - Prob. 9WIOCh. 15 - Compare todays changing culture to biological...Ch. 15 - Prob. 11WIOCh. 15 - Prob. 1PITCh. 15 - Refer to figure 15.31 and the chapter content to...Ch. 15 - Refer to figure 15.31 and the chapter content to...
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- Natural selection can sometimes help improve human health and other times is ineffective at improving human health. Explain one example of how selection has helped human health, and explain one example of how selection cannot help human health (including giving a reason why selection was or was not effective for each case). You can give hypothetical examples if you explain them well. A couple of sentences answer is fine.arrow_forwardDo you think society in the period of Darwin's theory of evolution was different from society in the twenty-first century? Why or why not? Try to think of three things. These can be similarities or differences. Use specific historical examples to justify each pointarrow_forwardNatural selection allows certain species to survive. The organisms that survive are those best adapted to their environment. Does natural selection make organisms more complex and perfect?arrow_forward
- Which of the following is not true of natural selection?(a) natural selection acts to preserve favorable traits and eliminate unfavorable traits (b) the offspring of individuals that are better adapted to the environment will make up a larger proportion of the next generation (c) natural selection directs the course of evolution by preserving the traitsacquired during an individual’s lifetime (d) natural selection Test Your Understanding acts on a population’s genetic variability, which arisesthrough mutation (e) natural selection may result in changes in allele frequencies in a populationarrow_forwardWhen discussing natural selection and behaviour, we often say that members of a species have certain behavioural traits because those traits are adaptive, in the sense that they increase inclusive fitness relative to alternative forms of those traits that have existed in the past. Instead of emphasizing the adaptiveness of behavioural traits, some biologists describe natural selection as a process that operates on nervous system traits, increasing the prevalence within a population of particular patterns of neural circuitry and neurobiological mechanisms. As an alternative to emphasizing either the behaviour or the nervous system, some biologists describe natural selection as a process that operates on genes; according to this perspective, certain forms of certain genes (ie., particular alleles) increase in prevalence within a population relative to alternative forms of those genes. Which, if any, of these three perspectives on natural selection and behaviour do you think is the most…arrow_forwardThe domestication or breeding of animals to have as pets, livestock on farms, or for work purposes is a form of artificial selection. Charles Darwin used these practices to support his theory of species change by natural selection. How is artificial selection similar to natural selection? When animals with favorable traits are bred with animals with unfavorable traits, the offspring will have favorable traits, so breeders were changing species by removing certain traits. For artificial selection to work, only the strong survive to reproduce. By breeding animals with specific traits, breeders were able to produce a wide variety of breeds within a short period of time. Artificial selection involves breeding two different species and determining if a hybrid organism can be produced.arrow_forward
- Which of the following is not true of natural selection? (a) natural selection acts to preserve favorable traits and eliminate unfavorable traits (b) the offspring of individuals that are better adapted to the environment will make up a larger proportion of the next generation (c) natural selection directs the course of evolution by preserving the traits acquired during an individuals lifetime (d) natural selection acts on a populations genetic variability, which arises through mutation (e) natural selection may result in changes in allele frequencies in a populationarrow_forwardWhich statement is accurate about natural selection? It is a biological process that prevents species from adapting to significant changes in their environments. It is a biological process that leads a population to have a widespread expression of an advantageous trait. It is a biological process that allows a population to have a competitive advantage in many environments. It is a biological process that causes certain traits to be expressed less with each subsequent generation.arrow_forwardDarwin proposed natural selection as a mechanism for evolution. How is it similar to artificial selection? How is it different?For natural selection to work, there must be genetic variation within a population as well as mutations? Why must there be both?arrow_forward
- Darwin put together several pieces of information when formulating his theory of evolution. Which of the following is/are not part of that information? Choose All That Apply Natural populations of organisms display variable phenotypes Natural populations tend to produce more offspring then the environment can support Individuals within a population can pass on traits acquired during their lives to their offspring Organisms tend to be uniquely adapted to the environments in which they are found Each individual in a population is equally likely to survive and produce offspringarrow_forwardWhich of the following best describes natural selection? O It is a guess made by scientists about how life develops, but it has no hard evidence to support it. It is the idea that the strong survive and the weak die off. It is the idea that organisms with genetic traits that improve their ability to reproduce are more likely to pass those traits on to future generations. It is the idea that organisms naturally increase in complexity and intelligence with time.arrow_forwardWhich of the following factors are required in order for evolution to occur? a. Individuals within a population must be receptive to change and collectively determine which trait(s) is/are to be modified in subsequent generations b. Genetic variation within a population must exist or have the potential to arise, and shifts in allelic frequencies will take place or have the potential to take place c. Individuals within a population should be able to reproduce effectively (i.e., without barriers to reproduction existing) d. Both A & B e. Both B & Carrow_forward
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