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- 1. What kinds of limited resources can create a struggle between individuals in a population? 2. What kinds of variable traits within a population might natural selection act upon? Use a finch population as an example.1. Which of these populations has all the characteristics needed to evolve by natural selection? A. a population of lizards may be brown or red. The temperature of the eggs determines the color of the baby lizards, and a brown parent lizard is equally likely to give birth to either color of offspring. B. a population of spiders includes individuals that build their webs in triangle shapes and others that build their webs in round shapes. They inherit their web-building strategies from their parents and all shapes are equally successful at catching insects. C. some gazelles are capable of running faster than others, a skill that is partially genetic Faster gazelles tend to live longer and have more offspring. A. Population A B. Population B C. Population C 2. Your friend asks you "If evolution is real, why aren't humans perfectly adapted by now! why do people still get heart disease and cancer and die?" Which of these would be an accurate response you could give? A. Evolution only…If a population of skunks includes some individuals with stripes and others with spots, would you describe the variation as quantitative or qualitative?
- An Eastern European immigrant carrying the allele for Tay-Sachs disease settled in a small village on the St. Lawrence River. Many generations later, the frequency of the allele in that village is statistically higher than it is in the immigrants homeland. The high frequency of the allele in the village probably provides an example of: a. natural selection. b. the concept of relative fitness. c. the HardyWeinberg genetic equilibrium. d. phenotypic variation. e. the founder effect.Which of the following situations will lead to natural selection? The seeds of two plants land near each other and one grows larger than the other Two types of fish eat the same kind of food, and one is better able to gather food than the other Male lions compete for the right to mate with females, with only one possible winner all of the aboveWhen male lions reach sexual maturity, they leave their group in search of a new pride. This can alter the allele frequencies of the population through which of the following mechanisms? natural selection genetic drift gene flow random mating
- The phenomenon in which chance events cause unpredictable changes in allele frequencies is called: a. gene flow. b. genetic drift. c. inbreeding. d. balanced polymorphism. e. stabilizing selection.Population genetics is the study of: how selective forces change the allele frequencies in a population over time the genetic basis of population-wide traits whether traits have a genetic basis the degree of inbreeding in a population1.) The process in which the genetic composition of a population changes with time is known as evolution. Which of the following mechanisms is not an agent of evolutionary change? A) natural selection B) mutation C) genetic drift D) random mating 2.) Which statement below is not consistent with a population in Hardy-Weinberg equilibrium? A) Genetic drift is occuring B) Random mating is occuring. C) Population size is large. D) Migration is not occuring.
- 8. In human populations birth survival rates tend to increase towards children born with a more average birth weight. In terms of natural selection this is known as a. Disruptive Selection b. Directional Selection c. Stabalizing Selection d. Random Selection6) If a sudden frost kills many small birds in a population, but only a few medium- and large-sized ones, which type of selection is likely operating? a.Intersexual b.Directional c.Disruptive d.Stabilizing1. The phenotype and genotype of a population is due to a "mosaic" of random and directed processes whereby some have to do with history and others related to adaption and other factors. Why is this so?