29. Which of the following "range of phenotype" graphs best captures this story: a species of beetle has small, medium, and large body sizes; the small beetles are able to hide well from the birds preying on them, and the large beetles put up a fight against the small birds preying on them; this leaves the medium ones to be preyed on more. 45 2.15 30 135 2)1.45 1.30 19c FREQUENCY Range of Phenotypes. FREQUENCY Range of Phenotypes 4- Phenotypes being selected FOR -Phenotypes being selected AGAINST Selection begins After selection

29. Which of the following "range of phenotype" graphs best captures this story: a species of beetle has small, medium, and large body sizes; the small beetles are able to hide well from the birds preying on them, and the large beetles put up a fight against the small birds preying on them; this leaves the medium ones to be preyed on more. 45 2.15 30 135 2)1.45 1.30 19c FREQUENCY Range of Phenotypes. FREQUENCY Range of Phenotypes 4- Phenotypes being selected FOR -Phenotypes being selected AGAINST Selection begins After selection

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter45: Population And Community Ecology

Section: Chapter Questions

Problem 17RQ: Which of the following statements does not support the conclusion that giraffes are k-selected...

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6. You have identified an autosomal gene that contributesto tail size in male guppies, with a dominant allele B forlarge tails and a recessive allele b for small tails. Femaleguppies of all genotypes have similar tail sizes. Youknow that female guppies usually mate with males withthe largest tails, but the effects of population densityand the ratio of the sexes on this preference have notbeen studied. You therefore place an equal number ofmales in three tanks. In tank 1, the number of femalesis twice the number of males. In tank 2, the numbers ofmales and females are equal. In tank 3, half as manyfemales as males are present. After mating, you findthe following proportions of small-tailed males amongthe progeny: tank 1, 16%; tank 2, 25%; tank 3, 30%.a. In your original population (before the animals wereplaced in the three tanks), 25% of the males havesmall tails. Assuming that the allele frequencies inmales and females are the same, calculate the frequencies of B and b in your…
37. When 2 different species are competing for a resource, in the absence of other factors, one will usually win because the competition is asymmetrical. That is because: One species usually cheats. Populations have different numbers of individuals. Different species have different morphologies (how they look) and physiologies (how they function). All of the choices are true.
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1.List, in order from highest to lowest, the current distribution of the U.S. population by race/ethnicity.
The age structure diagrams for two hypothetical populations are shown below. Describe the growth rate of each population and discuss the current and future social and economic problems that each is likely to face.
The population is an important unit in ecology as well as other biological sciences. How is a population defined, and what are the strengths and weaknesses of this definition? Are there some species that at certain times or places are not in populations?
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Which of the following statements does not support the conclusion that giraffes are k-selected species? Giraffes are approximately 6' tall and weigh 150 Ibs at birth Wild giraffes begin mating at 6-7 years of age Newborn giraffes are capable of coordinated walking within an hour of birth, and running within 24 hours of birth Giraffes rarely give birth to twins.
2)Which of the following best describes the difference between population size and population density? a)Population size measures the abundance of an organism, whereas population density measures the distribution b)Both variables measure abundance, but population density takes the into account the size of individuals, not just the number of individuals in the population c)Population size measures abundance, but population density measures how rapidly the size changes d)Population density measures the abundance of an organism, whereas population size measures the distribution e)None of these descriptions are correct
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