Consider a hypothetical beetle population, in which beetle colour varies along a spectrum from light to dark green. When introduced to an environment characterized by light green moss and dark green shrubs, both light and dark green beetles have higher fitness than medium green beetles. Which of the following terms best describes this situation? Select one: O a. Stabilizing selection O b. Directional selection O c. Disruptive selection O d. Sexual selection

Consider a hypothetical beetle population, in which beetle colour varies along a spectrum from light to dark green. When introduced to an environment characterized by light green moss and dark green shrubs, both light and dark green beetles have higher fitness than medium green beetles. Which of the following terms best describes this situation? Select one: O a. Stabilizing selection O b. Directional selection O c. Disruptive selection O d. Sexual selection

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter19: Evolutionary Change In Populations

Section: Chapter Questions

Problem 6TYU: The continued presence of the allele that causes sickle cell anemia in areas where falciparum...

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Assuming that this population is randomly mating, the following relative fitnesses represent what kind of selection? p = f[A], q = f[a] Genotype Relative Fitness AA p2 Aa 0.5 aa q2 Select one: O a. Overdominant b. Underdominant O c. Positive Frequency Dependent O d. Negative Frequency Dependent O e. Balancing Of. Directional g. Two of the above. Based on the Evolutionary Pathways in Nature reading by John Avise, how many of the following statements are true? -Red pandas and giant pandas are not each other's closest relatives. - Both red pandas and giant pandas are ursids. - Eggs are unique to birds. - HIV-1 in humans is more closely related to SIV from chimpanzees than it is to HIV-2 in humans. Select one: O a. None of these statements are correct. O b. One statement is correct. Two statements are correct. O d. Three statements are correct. O e. All four statements are correct.
People with two copies of the sickle cell gene are often quite ill with sickle cell anemia, while those with two copies of normal hemoglobin are likely to become quite ill with malaria where it occurs. Heterozygotes suffer few effects of sickle cell anemia, and are considerably resistant to malaria. In areas where malaria occurs, it exerts on the human population. O A. Directional selection O B. Disruptive selection O C. Bimodal selection O D.Stabilizing selection O E. None of the above «< Question 20 of 120 A Moving to another question will save this response. 12:01 12/16/2 6. PgUp PgDn F12 PrtScn F8 Home F9 End F10 F11 DII F5 F7 F6 F4 F3 & #3 7 8. 9. 3 Y U R 近

Which of the following is NOT true of stabilising selection a. it occurs when inidivuals with extreme trait values have lower fitness than those with intermediate trait values. b. it keeps the mean close (or moves it closer) to the optimum value c. it can result from opposing directional selection, such as when early flowering makes flowers susceptible to herbivores, but late flowering reduces the availability of pollinators. d. it does not improve the fitness of the population to the environment. e. it decreases the range of variation in the population
Some females seem to prefer the green colouration and some females seem to prefer the blue colouration. What type of selection is this an example of? a. stabilizing b. balancing c. directional d. diversifying
/hich of the following is an example of disruptive selection? O Short weeds that grow close to the height O Dark-colored moths that hl survive to reprod
The Hardy-Weinberg equation characterizes the allele and genotypefrequenciesa. of a population that is experiencing selection for mating success.b. of a population that is extremely small.c. of a population that is very large and not evolving.d. of a community of species that is not evolving.e. of a community of species that is experiencing selection.
Many species of birds choose their mates based on how brightly colored they are. If feather color is heritable, how would this violate the assumptions required for a population to be in Hardy-Weinberg equillibrium? HW equilibrium would cause mutations in such a species. A. This is a founder effect В. This is a bottleneck effect C. OD. Mating is non-random. Alleles for brightly colored phenotypes might become more common in the species and allele frequency would change.
There is no effect of selection on the Hardy Weinberg Equilibrium. O A. True B. False.
How would the graph of the number of individuals of a population that has experienced disruptive selection be different than the normal distribution? Select all that apply. a There would be more individuals at the extremes. b There would be one peak. c There would be more individuals in the middle. d There would be no difference from the normal distribution. e There would be two peaks.
Selection that causes one extreme phenotype to be more frequent in a population is an example ofa. disruptive selection.b. stabilizing selection.c. directional selection.d. equivalent selection.
A local pond is a favorite habitat for Canadian geese. Coyotes prey on geese and typically hunt either old or fat geese. After several years, the average of age and weight of the geese have reduced. These changes are due to: O A Stabilizing selection O B Negative frequency dependent selection C Directional selection D Disruptive selection O E Heterozygote advantage
You are examining the gene in your snail population that confers resistance to a parasite. There are multiple alleles at this locus. Identify the characteristics that would result in the greatest increase resistant allele. allele frequency (not necessarily the greatest allele frequency) in one single generation of the Answer Resistant allele acts.. Initial resistant allele frequency... Selection strength is... dominantly high weak la. b. recessively low strong dominantly low strong С. d. recessively high weak O a. Answer a. O b. Answer b. O c. Answer C. O d. Answer d.