Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 17.3, Problem 1TC
Make a list of events or processes that could cause geographic subdivision of a population. Do you think items on your list are sufficient to account for formation of the millions of species that have inhabited Earth?
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Chapter 17 Solutions
Biology
Ch. 17.1 - One way to determine the number of species on...Ch. 17.1 - Prob. 1TCCh. 17.1 - The tiny frog paedophryne amauensis was discovered...Ch. 17.1 - describe how biologists define species and explain...Ch. 17.1 - describe the biological species concept and...Ch. 17.1 - list some reasons why it can be hard to tell...Ch. 17.2 - describe the main types of premating and...Ch. 17.2 - provide examples of each type of mechanism?Ch. 17.3 - Make a list of events or processes that could...Ch. 17.3 - How might conservation scientists use the map...
Ch. 17.3 - It is not surprising that the forests of New...Ch. 17.3 - Prob. 3TCCh. 17.3 - Prob. 4TCCh. 17.3 - Prob. 5TCCh. 17.3 - One possible explanation for the distinctive...Ch. 17.3 - describe the two general steps that are required...Ch. 17.3 - explain the difference between allopatric and...Ch. 17.3 - explain adaptive radiation and describe the...Ch. 17.3 - interpret an evolutionary tree diagram?Ch. 17.4 - If specialization puts a species at risk for...Ch. 17.4 - Prob. 1CTCh. 17.4 - describe the main causes of extinction?Ch. 17.4 - Prob. 2CYLCh. 17.4 - Given that genetic isolation is the first step in...Ch. 17 - The biological species concept is difficult or...Ch. 17 - Which of the following does not describe a...Ch. 17 - All instances of speciation require a. genetic...Ch. 17 - Analysis of Rhagoletis fly populations in North...Ch. 17 - In the initial phase of allopatric speciation,...Ch. 17 - A species is a group of ________ that evolves...Ch. 17 - Fill in the following with the appropriate...Ch. 17 - Formation of a new species occurs when two...Ch. 17 - The process by which many new species arise in a...Ch. 17 - A species may be at higher risk of extinction if...Ch. 17 - Define the following terms: species, speciation,...Ch. 17 - Many of the oak tree species in central and...Ch. 17 - Review the material on the possibility of...Ch. 17 - A drug called colchicine prevents cell division...Ch. 17 - What are the two major types of reproductive...Ch. 17 - It is difficult to perform experiments that test...
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- What is Microevolution? A) The change of a population over several generations B) The history of a species from its origin C) The history of all populations and their descendantsarrow_forwardSuppose a very small group of birds serves as the foundation of a new population. As a result, the population is very genetically homogeneous. What phenomenon has affected this population? O a) Mutation O b) Gene flow Oc) Non-random mating O d) Genetic driftarrow_forwardChoose the answer that best relates to the concept of Gene Flow. Group of answer choices A: All of these answers are true B: involves the mixing of alleles between sub-populations through interbreeding. C: helps keep the population gene pool from regionally diversifying too much. D: has increased for humans recently through globalization and migrationarrow_forward
- Let us suppose that an organism began with 10 individuals. It then went on through 25 generations. How many individuals would then be present in the final generation? 3.4 6250 3.4 107 3.4 * 108arrow_forwardWhich of the following best describes the biological significance of genetic diversity between populations? A) Genes for traits conferring an advantage to local conditions are unlikely. B) Diseases and parasites are not spread between separated populations. C) Genetic diversity reduces the probability of extinction. D) The population that is most fit would survive by competitive exclusion.arrow_forwardConsider the 4 lines of data to be from the life tables of various species. Each one represents a different age class, and they report values for lx, dx, qx, and bx. Again, they are from different species. Which of the 4 choices would you say belongs to the species with the most intense age specific mortality? Group of answer choices l4 = 711, d4 = 211, q4 = 0.723, b4 = 0.98 l1 = 549, d1 = 242, q1 = 0.613, b1 = 0.08 l2 = 267, d2 = 199, q2 = 0.214, b2 = 1.28 l3 = 915, d3 = 377, q3 = 0.357, b3 = 2.90arrow_forward
- (b) Suppose that we want to model the evolution of the population of a cer- tain type of organisms. Observations indicate that if the population drops below a survival level of 10° individuals, it goes extinct. Moreover, the population growth is limited: the available resources of space and food can sustain at most 106 individuals. We treat the population size P(t) as a continuous function of time. (i) Explain briefly how the following model incorporates the above ob- servations: dP — К(А- Р)(Р — В), k>0, dt where P(t) denotes the population size at time t and B 0. dt Find the equilibrium values and determine their stability. [6]arrow_forwardThink about the pattern of human dispersal. Given what you know about the founder effect, would you expect populations native to South America to be more or less genetically diverse than those native to North America?Explain your reasoningarrow_forwardWhat processes affect the composition of a population’s gene pool?arrow_forward
- The graph below includes information on the average time to fixation of an allele (in generations) as a function of population size. The three different curves represent different starting allele frequencies. Which of the following statements correctly describes patterns depicted in the graph below? I. As population size increases, it takes fewer generations for alleles to reach fixation II. As starting allele frequency increases, it takes fewer generations for alleles to reach fixation III. Small populations will lose alleles more rapidly than large populations. IV. Even if starting allele frequency is low, fixation is possible - it just happens slowly. Only III is a correct description Only II is a correct description II, III, & IV are correct descriptions Both II & III are correct descriptions Both I & II are correct descriptions All four statements (I, II, III & IV) are correct descriptions asap pleasearrow_forwardA large conservation agency in Austria is interested in the status of the endangered newt species, Triturus austriacus, and wants you to estimate population sizes. Describe at least two methods based on genetic markers such as microsatellites which could be used to estimate effective population size (NE). Compare their relative advantages and disadvantages.arrow_forwardWhich resulting population has more genetic diversity?arrow_forward
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