Pearson eText Biology: Life on Earth with Physiology -- Instant Access (Pearson+)
12th Edition
ISBN: 9780135755785
Author: Gerald Audesirk, Teresa Audesirk
Publisher: PEARSON+
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Chapter 16, Problem 1FIB
The ______ provides a simple mathematical model for a non-evolving population, also called a(n) ______ population, in which ______ frequencies do not change over time. Are such populations likely to be found in nature? ______
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Chapter 16 Solutions
Pearson eText Biology: Life on Earth with Physiology -- Instant Access (Pearson+)
Ch. 16.1 - define evolution in terms of concepts from...Ch. 16.1 - define equilibrium population and describe the...Ch. 16.2 - If it were true that mutations do occur in...Ch. 16.2 - Explain how the distribution of genotypes in...Ch. 16.2 - A flu vaccination stimulates your immune system to...Ch. 16.2 - Prob. 3TCCh. 16.2 - If a population grows large again after a...Ch. 16.2 - Prob. 5TCCh. 16.2 - Evolution of a Menace The mutant alleles that...Ch. 16.2 - describe how mutation, gene flow, genetic drift,...
Ch. 16.3 - A team of phys clans treated four patients with...Ch. 16.3 - If we studied a population of bighorn sheep and...Ch. 16.3 - When selection is directional, is there any limit...Ch. 16.3 - describe why selection of phenotypes can affect...Ch. 16.3 - explain how competition and predation influence...Ch. 16.3 - Prob. 3CYLCh. 16.3 - compare and contrast directional selection,...Ch. 16.3 - Microbiologists have discovered that alleles...Ch. 16 - The alleles responsible for antibiotic resistance...Ch. 16 - Stabilizing selection on a trait tends to a. make...Ch. 16 - An adaptation is a. any trait that arises from a...Ch. 16 - Which of the following statements about mutations...Ch. 16 - Genetic drift occurs a. when different phenotypes...Ch. 16 - The ______ provides a simple mathematical model...Ch. 16 - Different versions of the same gene are called...Ch. 16 - An organisms ______ refers to the specific alleles...Ch. 16 - A random form of evolution is called ________....Ch. 16 - Competition is most Intense between members of...Ch. 16 - The evolutionary fitness of an organism is...Ch. 16 - What is a gene pool? How would you determine the...Ch. 16 - Define equilibrium population. Outline the...Ch. 16 - How does population size affect the likelihood of...Ch. 16 - If you measured the allele frequencies of a gene...Ch. 16 - People like to say that you cant prove a negative....Ch. 16 - Describe the three ways in which natural selection...Ch. 16 - What is sexual selection? How is sexual selection...Ch. 16 - In North America, the average height of adult...Ch. 16 - By the 1940s, the whooping crane population had...
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- The per capita birth (b) and death (d) rates are measured for two populations across a range of population sizes in the attached figure. The equation for exponential growth rate is dN/dt=rN where the per capita growth rate is r=(b-d). The equation for logistic population growth rate is dN/dt=rN(1-N/K). With logistic growth, r varies as a function of the population size with density-dependent birth and/or death rates. See attached image If the death rate decreased, what would happen to the population trajectory for population A? a) increase faster b) increase slower c) decrease faster d) decrease slowerarrow_forwardIn populations of many organisms there is an inverse relationship between the density of individuals (number per area) and the average size of the individuals. True or False?arrow_forwardA continuously growing population of bears has a population size of 500 and its intrinsic rate of increase is 0.07 per year. Assuming that this rate of increase remains the same, about how long should it take for the population to reach 1,000? (Note: “e” is about 2.7 and the natural logarithm of 2 is about 0.70).arrow_forward
- For the following question, assume that the population that you are observing is in Hardy Weinberg Equilibrium (not evolving). If a population starts out with 7 Black Moths, 8 Grey Moths, and 30 White Moths, How many grey moths to you expect in the next generation if the population is 45? [grey] Round your answers to the nearest 1/100th (two decimal places)arrow_forwardThe graph below represents the number of individuals in a population of wolves and in a population of moose observed in the same isolated geographic area over a 40-year period, from 1955 through 1995. Which of the following statements about the two populations is best supported by the information presented in the graph?* 2,500 2,250 2,000 1,750 Wolves - 50아 Moose .-.. 40 1.500 1,250 30 1,000 2아 750 1어 500 250 1955 1960 1965 1970 1975 1980 1985 1990 1995 Year The wolves were predators of the moose, which were otherwise reproductively successful. Mutualism allowed the two populations to reproduce while occupying the same ecological niche. Speciation occurred when the two populations became reproductively isolated from each other The reproductive rate of the wolves was greater than the reproductive rate of the moose Wolf Population Size Moose Population Sizearrow_forwardGeometric growth refers to the growth of populations that do not have overlap in their generations. Annual plants and some insects are good examples where adults die before young individuals mature to reproduce. Pacific salmon are an example of a vertebrate with geometric growth because spawning (egg laying). The equation for geometric growth is: N=2 No; where 2= finite rate of increase and t=number of time intervals. Question A1. Calculate the population size after 10 time intervals (N10) if No = 120 and 2 = 1.1. Question A2. If N1 =750 and N2 = 890, calculate 2arrow_forward
- Which set of values for the intrinsic rate of increase, finite rate of increase, and net reproductive rate could describe the same growing population? (Note: you should not need to do any math to figure this one out. Just think through general interpretations of each parameter) Or = -0.14, A = 0.87, RO = 0.5 r = 3.0, A = 0.22, RO = 0.5 r = 0.22, A = 1.25, RO = 3.0 %3! r = = 0.22, A = -0.14, RO = 0.5arrow_forwardYou are studying a density - dependent turtle population that has the following relationships for the birth rate b’ and the death rate d’ as a function of population size (N) : b’ = 0.10 + 0.03 N - 0.0005 N ^2 d’ = 0.20 + 0.01 N Plot these functions in the same graph and discuss the population dynamics of the turtle. How does this model differ from the simple logistic model with linear birth and death functions?arrow_forwardIf the assumptions of Hardy-Weinberg Theorem are not met, this means that most populations are evolvingarrow_forward
- Two stable populations employ the same fertility schedule, but different mortality schedule. In both populations, 20% of women between exact ages 45-55 bear a female child annually. No child bearing occurs outside this span. In population A, there is no mortality until age 100 where all who reached age perish. In population B, 1% of each cohort dies within each single year of age with no survivors beyond age 100. Compute GRR, GRR and r for each population. ii) Determine the birth and death rate of each. Sketch the age distribution of each.arrow_forwardbartleby SEARCH https://www.bartleby.com/questio... ASK AN EXPERT Science >> Biology » The logistic model incorporates carrying capacity to make the moc Question exponential The logistic model incorporates carrying capacity to make the model random density-dependent LIVE TUTORING density-independent Transcribed Image Text: The logistic model incorporates carrying capacity to make the model exponentia dependent random density-independent Type here to search HAarrow_forwardIn a study of eastern red-backed salamanders (Plethodon cinereus), a biologist randomly placed seven 1.0 m by 1.0 m quadrats in a field that measured 100 m by 100 m. Estimate the population density and size if the biologist found 0, 1, 1, 2, 0, 1, and 3 salamanders in the seven quadrats. | ---arrow_forward
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