AP Bio Unit 2 Review Study Guide Questions and Correct Answers

AP Bio Unit 2 Review Study Guide Questions and Correct Answers Which statement about natural selection is most correct? DDT was once considered a "silver bullet" that would permanently eradicate insect pests. Today, instead, DDT is largely useless against many insects. Which of these would have been required for this pest eradication effort to be successful in the long run? Which of the following pieces of evidence most strongly supports the common origin of all life on Earth? The theory of evolution is most accurately described as Which of these is a statement that Darwin would have rejected? Which definition of evolution would have been most foreign to Charles Darwin during his lifetime? Which of these evolutionary agents is most consistent at causing populations to become better suited to their environments over the course of generations? Each of the following has a better chance of influencing gene frequencies in small populations than in large populations, but which one most consistently requires a small population as a precondition for its occurrence? In a Hardy-Weinberg population with two alleles, A and a, if the frequency of the allele a is 0.4. What is the percentage of the population that is homozygous for this allele? In a Hardy-Weinberg population with two alleles, A and a, if the frequency of allele a is 0.2. What is the frequency of individuals with Aa genotype? A large population of laboratory animals has been allowed to breed randomly for a number of generations. After several generations, 25% of the animals display a recessive trait (aa), the same percentage as at the beginning of the breeding program. The rest of the animals show the dominant phenotype, with heterozygotes indistinguishable from the homoygous dominants. What is the estimated frequency of allele A in the gene pool? A large population of laboratory animals has been allowed to breed randomly for a number of generations. After several generations, 25% of the animals display a recessive trait (aa), the same percentage as at the beginning of the breeding program. The rest of the animals show the dominant phenotype, with heterozygotes indistinguishable from the homozygous dominants. What proportion of the population is probably heterozygous (Aa) for this trait? In a certain flock of sheep, 4% of the population has black wool and 96% has white wool. Assume that the population is in Hardy-Weinberg equilibrium. If black wool is a recessive trait, what percentage of the population is heterozygous for this trait? In a certain flock of sheep, 4% of the population has black wool and 96% has white wool. Assume that the population is in Hardy-Weinberg equilibrium. What percentage of the population is homozygous for white wool? Some species on Anopheles mosquito live in brackish water (slightly saline), some in running fresh water, and others in stagnant water. What type of reproductive barrier is most obviously separating the different animals? Which of the following is NOT a requirement for the maintenance of Hardy-Weinberg equilibrium? An African butterfly species exists in two strikingly different color patterns, each of which closely resembles other species that are distasteful to birds. Fossil evidence indicates that horses have gradually increased in size over geological time. Brightly colored peacocks mate more frequently than do drab peacocks. A certain species of land snail exists as either a cream color or a solid brown color. Intermediate individuals are relatively rare. The Darwinian fitness of an individual is measured most directly by What was the species concept most used by Linnaeus? The correct sequence, from the most to the least comprehensive, of the taxonomic levels listed here is Which of the following pairs are the best examples of homologous structures? Anatomical structures that show similar function but dissimilar embryonic and evolutionary background are said to be . A common ancestor for both species C and E could be at position number The two extant species that are most closely related to each other are What would be the best technique for determining the phylogenetic relationship among several closely related species? A characteristic of allopatric speciation is The ostrich and the emu look very similar and live in similar habitats, although they are not closely related. This is an example of ____________.