Simmons and Scheepers in their article Winning by a Neck present evidence that the long neck of the giraffe is the result of: Select one: a.genetic drift b.inheritance of acquired characteristics c.intersexual selection d.intrasexual selection e.natural selection

Which of the following types of selection maintain variation in a population?   a. Overdominance (Heterozygote advantage)   b. Underdominance (Heterozygote disadvantage)   c. Frequency-dependent selection   d. Directional selection   e. Both a. & b.    f. Both a. and c.    g. Both a. and d.

Which of the following statements about the studies on Darwin's finches conducted by Rosemary Grant and Peter Grant since the 1970s is correct?     -For the trait of beak depth, there are clear differences among individuals on the island Daphne Major.     -After comparing measurements of beak depth between parents and offspring across many families, they found that similarity in beak depth is mainly due to genetic inheritance.     -After the 1977 drought, it was found that the average beak depth of the population has increased when compared to the population average before the drought.     -The study of Darwinâ s finches is often used as an example of natural selection in the field.     -All of the above

Which of the following is true regarding vestigial traits?   A. Vestigial traits are evidence for change over time   B. Vestigial traits are evidence for common ancestry   C. Vestigial traits indicate that not evolution does not perfect organisms   A and B   A, B, and C

Assume you are studying a population of hummingbirds. You discover that the smallest hummingbirds can't keep their eggs warm and those eggs tend to fail. You also discover the largest hummingbirds tend to accidentally crush their eggs, so those eggs fail. The medium-size hummingbirds therefore have the highest fitness. What type of selection would this result in?   a. Directional selection   b. Sexual selection   c. Disruptive selection   d. Stabilizing selection

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

Read the statement and state which evolution it is  natural selection that leads to evolution of phenotypic differences  A. Stabilizing selection  b. Frequency dependent  c. Sexual selection  d. Diversifying seledtion e. Directional selection

Long bearded macaques are a (hypothetical) species of monkey who grow long white hair on their faces. A team of scientists studying a population of long bearded macaques notices that males with longer hair get more opportunities to mate and father more offspring. They hypothesize that long hair is adaptive in male monkeys. How should they test their hypothesis? a. Look for evidence of hair in the ancestors of macaques. b. Determine whether macaque hair length is heritable. c. Test if other traits in male macaques are also adaptive d. Test if male macaques who have had their faces shaved are still able to mate.* O e. Measure hair length of female macaques.

Which of the following is NOT a correct statement regarding the neutral-mutation explanation for the high levels of genetic variation? A. Most genetic variation observed is adaptively neutral. B. Natural selection plays a lesser role in maintaining genetic variation. C. When natural selection occurs it leads to a decrease in genetic variation. D. Genetic variation is maintained mainly via the random effects of genetic drift.

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