Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 24, Problem 5IQ
Use the following diagrams to explain the three possible outcomes for a hybrid zone over time.
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A small community that is heavily infested with mosquitoes was sprayed weekly with the insecticide DDT for several months. Daily counts providing information on mosquito population size are represented in the graph below.
Provide a biological explanation for the changes in the mosquito population over time.
Use the terms: insecticide resistance/resistant, natural selection, favorable trait, reproduce, mutation/sexual reproduction
What long-term effects can gene flow have on any two populations that are exchanging genes?
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State three possible reasons why species would have “clumped distribution” within their populations? Write two sentences for each reason.
Chapter 24 Solutions
Study Guide for Campbell Biology
Ch. 24 - Prob. 1IQCh. 24 - Fill in the following table to review three of the...Ch. 24 - a. A new plant species 8 forms by autopolyploidy...Ch. 24 - a. Differentiate between allopatric and sympatric...Ch. 24 - Use the following diagrams to explain the three...Ch. 24 - Prob. 6IQCh. 24 - Prob. 1SYKCh. 24 - Prob. 2SYKCh. 24 - What does the term punctuated equilibria describe?Ch. 24 - Prob. 1TYK
Ch. 24 - Prob. 2TYKCh. 24 - Prob. 3TYKCh. 24 - Which of the following is not a mechanism...Ch. 24 - Prob. 5TYKCh. 24 - Prob. 6TYKCh. 24 - Prob. 7TYKCh. 24 - Prezygotic barriers to reproduction between...Ch. 24 - A botanist identifies a new species of plant that...Ch. 24 - Which of the following would not contribute to...Ch. 24 - Morphological and genetic comparisons group 30...Ch. 24 - Prob. 12TYKCh. 24 - This chapter introduced several research studies...
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- Describe two mechanisms that can decrease gene flowin sympatric populations, thereby making sympatricspeciation more likely to occur.arrow_forwardChoose True for yes and False for no, for each of the statements 1) The distribution of the two species-C populations cannot be explained by two totally independent dispersal events by the common ancestor species of A and B. True or false 2) B must share a more recent common ancestor with C1 than it does with C2. True or falsearrow_forwardbriefly explain why there is species variation?arrow_forward
- Over time, enough genetic variations can develop within a population to cause it to undergo speciation. Identify the various mechanisms that will prevent different species from being able to reproduce successfully. Which of these mechanisms is the most influential in keeping species sperate?arrow_forwardDescribe how dispersal between populations can affect gene flow.arrow_forwardGive an example of each of the following evolutionary forces: mutation, natural selection, genetic drift, gene flow, and nonrandom mating.arrow_forward
- Which of these outcomes are examples of reproductive isolation? Select all that apply. Individuals of different species are physically compatible and can engage in sex Hybrid individuals cannot produce offspring Hybrid individuals or their offspring have similar fitness to the original species Reproduction occurs at different times Mating occurs but fertilization does not occurarrow_forwardChoose the sentence that best relates to Translocation Group of answer choices A: A chromosomal mutation where genetic material is switched between two chromosomes B: the process of causing genetic drift through migration C: None of these answers are true D: when a predator acts as a selective agentarrow_forwardClassify the examples as pre‑zygotic or post‑zygotic barriers.arrow_forward
- Scientists studying reproduction compared three closely related species of bagworm moths. The reproductive methods for these species are given in the table. Which of the following research questions would provide additional information about the population level impacts of meiosis and sexual reproduction? A - How do the number of D. charlottae offspring compare with the number of S. rupicolella offspring? B - Do D. charlottae and S. rupicolella populations express greater genetic diversity than D. fennicella populations? C - Are the offspring of D. fennicella genetically unique compared to the offspring of D. charlottae and S. rupicolella? D - Does crossing-over in D. fennicella result in increased genetic variation compared to D. charlottae and S. rupicolella?arrow_forwardWhat are examples for gene flow? Select all that apply A distinct population of iguana drift to a new island that is already inhabited by members of the same species. A small population of humans colonizes a newly formed island. A fire drastically reduces the size of a white-tailed deer population. The remaining individuals spread out throughout the remaining forest. Wind blows pollen from one population of plants to another and cross-fertilization occurs. n An earthquake results in the formation of a canyon, splitting a population of toads apart.arrow_forwardA small community that is heavily infested with mosquitoes was sprayed weekly with the insecticide DDT for several months. Daily counts providing information on mosquito population size are represented in the graph below. Provide a biological explanation for the changes in the mosquito population over time. Use the terms: insecticide resistance/resistant, natural selection, favorable trait, reproduce, mutation/sexual reproduction Use this sentence starter: At the beginning the daily mosquito count (increased/decreased) until month _, then it started to (increase/decrease). This occurred because.. Use NUMBERS FROM THE GRAPHarrow_forward
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