Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Textbook Question
Chapter 17, Problem 2FIB
Fill in the following with the appropriate isolating mechanism: Occurs when members of two populations have different courtship behaviors: ________; occurs when hybrid offspring fail to survive to reproduce: __________; occurs when members of two populations have different breeding seasons: ___________; occurs when sperm from one species fails to fertilize the eggs of another species: _____________; occurs when the sexual organs of two species are incompatible: ______________.
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Students have asked these similar questions
Classify the following scenarios with the appropriate term regarding different types of reproductive barriers.
a. One species of owl is diurnal (active in daylight) and another is nocturnal (active at night)________________________
b.The blue footed booby will only mate after a male displays their bright blue feet_________________________
c. The hybrid offspring of a horse and donnkey is sterile___________________________________
2. Use the diagram to the right to answer the following questions.
c.Which letter (A, B, or C) represents the original population of fish?
b.Which letter represents allopatric speciation? Explain your answer.
c.Which letter represents sympatric speciation? Explain your answer.
Which of the following species would have the greatest chance of going extinct?
a species with a slow reproduction rate and very little genetic variation living in a changing environment
a species with a fast reproduction rate and lots of genetic variation living in a changing environment
a species with a slow reproduction rate and very little genetic variation living in a stable environment
a species with a fast reproduction rate and lots of genetic variation living in a stable environment
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 please
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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- Which of the following would count as evidence that two populations are different species, according to the biological species concept?.arrow_forwardIdentify which of the following are examples of temporal isolation. Two species have different courtship displays. Two species are sexually active at different times of the day. Two species have different habitat ranges. Two species mate at different times of the year, one in early spring and one during the summer. Two species of wild lettuce grow in the same area, but one flowers in early spring and the other flowers in summer. Two species of birds live in the same area and mate at the same time, but have different songs.arrow_forwardWhich of the following is NOT an example of an r-selected population? Select one: a. Mosquito lifespan is between 42 and 56 days for females and 10 days for males. b. Minnows spawn 16 to 26 times per year, yielding up to 10 000 eggs per female. c. Houseflies are very tolerant of a wide range of environmental conditions and thus have a broad range of habitat. d. Algae are capable of reproducing asexually and sexually to take advantage on the conditions of the environment.arrow_forward
- Based on the biological species concept, which of the following would lead biologists to conclude that different populations of lizards were actually a single species rather than two different species? A.) lizards from the two different populations mate rarely, and produce hyrbid offspring that are sterile B.) Lizards from the two differnt populations mate during different seasons C.) Lizards from the two different populations mate regularly and produce sterile offspring D.) Lizards from the two different populations matre regularly and produce viable offspring capable of reprodarrow_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_forwardWhat is a cline? A. A gradual change in genetic or phenotypic characteristics of a population within a set geographic space. B. A gradual change in genetic or phenotypic characteristics of a population over geographic space. C. Similar genetic or phenotypic characteristics of a population within the same geographic space. D. Discrete changes in genetic or phenotypic characteristics of a population over geographic space.arrow_forward
- New Zealand snapper populations were found to be under the influence of genetic drift, suggesting overfishing was still an issue for them, despite the New Zealand fisheries estimating their total population size to be over 3 million. Which of the following is the best explanation for this observation? A) Pelagic fish, like the New Zealand snapper, often only have a few reproductive individuals, therefore their effective population size is actually much smaller than the total population size. B) Pelagic fish, like the New Zealand snapper, often have an equal sex ratio which affects the number of breeding individuals. C) Pelagic fish, like the New Zealand snapper, often have disassortative mating which affects the number of breeding individuals. D) Pelagic fish, like the New Zealand snapper, often have assortative mating which affects the number of breeding individuals.arrow_forwardImagine three islands, each with a population of frogs. There are approximately 1,100 frogs on Island 1, 400 on Island 2, and 400 on Island 3. Researchers estimate that these populations have been separated for 800 years. Individuals in these populations show variation in markings on their body by shape and color. Frogs on Islands 1 and 2 have circle markings that are either red, blue, or purple. All frogs on Island 3 have yellow triangle markings. The islands recently became a tourist destination, with new passenger boats connecting Island 1 and Island 2, and Island 1 and Island 3 (there is no boat that goes between Island 2 and Island 3). Would a biologist agree or disagree with the following statements? part 1: It is possible that yellow or triangle markings exists on Island 1 at some point in the past. Question options: Agree Disagree part 2: Genetic drift is not occurring on Island 1. Question options:…arrow_forwardImagine three islands, each with a population of frogs. There are approximately 1,100 frogs on Island 1, 400 on Island 2, and 400 on Island 3. Researchers estimate that these populations have been separated for 800 years. Individuals in these populations show variation in markings on their body by shape and color. Frogs on Islands 1 and 2 have circle markings that are either red, blue, or purple. All frogs on Island 3 have yellow triangle markings. The islands recently became a tourist destination, with new passenger boats connecting Island 1 and Island 2, and Island 1 and Island 3 (there is no boat that goes between Island 2 and Island 3). Would a biologist agree or disagree with the following statements? part 1 The current boat routes will decrease the likelihood of a speciation event occurring between the frog populations on Islands 2 and 3 in the future. Question options: Agree Disagree part 2 The observation that…arrow_forward
- Imagine three islands, each with a population of frogs. There are approximately 1,100 frogs on Island 1, 400 on Island 2, and 400 on Island 3. Researchers estimate that these populations have been separated for 800 years. Individuals in these populations show variation in markings on their body by shape and color. Frogs on Islands 1 and 2 have circle markings that are either red, blue, or purple. All frogs on Island 3 have yellow triangle markings. The islands recently became a tourist destination, with new passenger boats connecting Island 1 and Island 2, and Island 1 and Island 3 (there is no boat that goes between Island 2 and Island 3). part 1:If frogs from Island 1 migrate to Island 3 but are unable to reproduce with the frogs on Island 3, then these populations would be classified as different species according to the Biological Species concept. agree or disagree part2: If frogs are able to sneak onto boats and move between the islands via the current routes, then gene flow…arrow_forwardWhat is an example of how migration causes changes in gene frequencies? Genetic material can become lost over time due to lack of reproduction when animals migrate. When animals migrate, their genes mutate on their own, changing the frequency that a gene allele shows up. When animals migrate, the mating becomes less random, causing inbreeding and, therefore, shifts in the proportion of alleles. Seeds of plants are carried to different locations and introduced to a new population, adding their own genetic material and, therefore, changing gene frequencies.arrow_forwardThe table below records information on a gene with two alleles, Z and Y, in four different populations. Use this information to answer the following questions. If migration were occurring between populations C and D, what do you predict the frequency of Z ought to be, based on the conditions given in the table? Population Frequency of allele Z Population size Fitness of ZZ Fitness of ZY Fitness of YY A 1.0 200 0.84 0.84 1.0 B 0 320,000 0.84 0.84 1.0 C 0.93 130,000 0.84 0.84 1.0 D 0.99 1,450,000 1.0 1.0 0.62 If migration were occurring between populations C and D, what do you predict the frequency of Z ought to be, based on the conditions given in the table? Group of answer choices A.) 0 B.) greater than 0 C.) 1.0 D.) randomarrow_forward
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