The increased air pollution of the nineteenth century due to the use of coal led to a darkening of surfaces from soot. Owls (primary predators of rock pocket mice) are nocturnal visual predators that are able to distinguish effectively between dark and light colors in low-light conditions. Which of the following would most likely represent the types of individuals found in one of the species resulting from shape becoming a prezygotic isolating mechanism in the initial population represented in Figure 1 ? B. Specimen 2 The SinoHimalayan fern, Lepisorus clathratus is widely distributed on the QinghaiTibetan plateau. A. Explain. Which of the following best predicts the impact on the lizard species if there is a gradual increase in the average temperatures found in both the lowlands and mountains in this region? They found that although all 12 populations were exposed to the same environmental pressures, each population had differentiated from one another genetically after 10,000 generations. A small segment of the original population is exposed to different environmental conditions, and a new subspecies emerges through natural selection. describes how the L. clathratus population would be affected? In an experiment, the scientist creates two groups of twenty highly inbred mice. There will not be any new individuals with the aa genotype. Based on the data in Figure 1, which of the following would most affect the allelic frequencies of the populations on Isabela and Butuan? Which of the following best describes the processes occurring between the mouse populations and their environments? The woodlot environment is arid and species 1 and 2 are well-adapted to conserve water. The animals in population A were reproductively isolated from those in populations B, C, and D. Which of the following statements best predicts the result of a comparison between the fossils found before and after the period of rapid change? AP Biology Practice Test: Unit 7 Natural Selection Does this exceed the (24-hr) air quality standard of 0.14 ppm? The scientists identified a period of stability or stasis, followed by rapid change, and then stasis again with regard to shell shape. AP Biology AP Classroom Unit 7 FRQ Flashcards | Quizlet C. Gene flow between populations A and B maintained sufficient variation in both gene pools to facilitate the development of two distinct species. The current global warming trend is placing new selective pressures on the species involved in these relationships. C. Populations with little genetic diversity are less likely to contain individuals that can withstand different selective pressures. C. Organisms in Bacteria, Archaea, and Eukarya each have adenine, thymine, guanine, and cytosine bases forming their DNA. A. AP Biology Unit 7 Evolution MCQ Questions 14.pdf - AP B. White circle, grey circle and black circle. Double strands of DNA placed in a harsh environment will unwind and form RNA molecules for long term information storage. The two populations will show significant genetic differences because the founder effect will result in significant losses in diversity in the smaller population. However, the distance between the rigid walls to which the two bars are attached was measured incorrectly, so that a misalignment of \bar{\delta} (exaggerated in Fig. Which of these would be an appropriate null hypothesis to test related to whether meteorites hit the Earth 3.6 billion years ago? D. A mixture of ribonucleotides such as adenine and uracil will spontaneously form single-stranded chains of RNA. Because the mice are highly inbred, they are essentially identical to one another. There are two species of elephant seals: northern elephant seals, Mirounga angustirostris, found off the western coast of North America from Baja California to the Gulf of Alaska, and southern elephant seals, M. leonina, found in the southern oceans. Henslow's sparrow populations came to a peak in the mid1900s. A famous study from the nineteenth century involves the peppered moth, Biston betularia, commonly found in Great Britain and Ireland. AP BIO COLLEGE BOARD UNIT 7 Flashcards | Quizlet In the preceding exercise, if the stick is moving in a direction along its length (like a properly thrown spear), how long will you measure its length to be? AP Bio Unit 7 | Biology Quiz - Quizizz A. D. Migrating pollinators will start migrating later in the year, switching from spring-flowering plants to summer-flowering plants. The original habitat contained mutagens, leading to the rise of new species as a result of accumulated mutations. D. The frequency of both alleles will increase because the population will enter a period of rapid growth. D. Controlled fires in counties 4 and 5 will lead to an increase in the sparrow population. Which of the following would most likely represent the types of individuals found in one of the species resulting from shape becoming a prezygotic isolating mechanism in the initial population represented in Figure 1 ? Over time, populations A and B developed into two distinct species. D. Most of the species found in the second static period will resemble each other more than the species found in the first static period. AP Bio 4.8 Multiple Choice Questions | Fiveable BIO 1- CH. Over time, populations A and B developed into two distinct species. The model is shown in Figure 1. Natural selection acted on variation that was present in both populations A and B, and the lack of gene flow eventually led to the formation of two new species. B. The increased air pollution of the nineteenth century due to the use of coal led to a darkening of surfaces from soot. A population of the species has the following allele frequencies: B=0.85 and b=0.15. A group of scientists found that in one population the frequency of the M allele was 0.82, and the frequency of the N allele was 0.18. WebLearn about unit 7 of AP Biology as we cover topics such as artificial selection, population genetics, hardy-weinberg equilibrium, evidence of evolution, common ancestry, continuing A. Migration of individuals between the Isabela and Butuan populations Cells with flagella were better able to find food and escape predators. The M4 and M5 populations have the lowest genetic diversity of all populations. B. Which of the following best predicts the impact on the lizard species if there is a gradual increase in the average temperatures found in both the lowlands and mountains in this region? B. B. A. C. Specimen 3 C. The woodlot is shaded, with little direct sunlight, and species 3, 4, and 5 are shade-intolerant canopy trees. The second group is fed the same food without the mutagen. The two populations will show significant genetic differences because the founder effect will result in significant losses in diversity in the smaller population. The frequencies of the different phenotypes in the moth population changed randomly due to genetic drift. Determine the amount T(C)\Delta T\left({ }^{\circ} \mathrm{C}\right)T(C) by which the two bars would need to be uniformly heated to bring the holes in the two bars into alignment. PPC#7A Answers.pdf - AP Biology Scoring Guide Unit 7 Ap biology unit 1 test answers - anfk. The group of mice fed the mutagen will show a greater ability to digest the food, because the higher genetic variation within the group makes it more likely that some individuals will have a combination of genes better adapted to the new food. In a particular region, a species of lizard lives in the lowlands. For a specific bike plus rider of total mass 78kg78 \mathrm{~kg}78kg, FD14.0NF_{\mathrm{~D} 1} \approx 4.0 \mathrm{~N}FD14.0N; and for a speed of 2.2m/s,FD21.0N2.2 \mathrm{~m} / \mathrm{~s}, F_{\mathrm{~D} 2} \approx 1.0 \mathrm{~N}2.2m/s,FD21.0N. Find at what slope angle \theta the bike and rider can coast downhill at a constant speed of 8.0m/s8.0 \mathrm{~m} / \mathrm{~s}8.0m/s. Two flat steel bars are supposed to be connected together by a pin at BBB, and the system is supposed to be stress free after the pin is inserted (see Fig.given). A shift to less polluting fuel in the twentieth led to cleaner air and a lightening of the moth's normal habitat. A scientist maintains a large population of the fruit fly Drosophila affinis in the laboratory. The animals in population A were exposed to different predators and had to modify their fur color to be better camouflaged. Henslow's sparrow is a songbird found in North American grasslands. D. The M4 and M5 populations have the lowest genetic diversity of all populations. A. Select the correct answer for the following questions: Statistics and Probability questions and answers; College Board AP Classroom Unit 7 The frequency of the MC1RD allele will decline due to natural selection. B. The degrees of relatedness in several native populations of prairie chickens in Marion and Jasper Counties in Illinois were determined. The model is shown in Figure 1. The increased air pollution of the nineteenth century due to the use of coal led to a darkening of surfaces from soot. Dark color is selected for in mice from the West, Mid, and East populations. The frequency of the BB allele will increase because light-colored individuals will be more visible to predators. Which of the following statements includes a reasonable refinement that researchers could use in repeating the experiment? Which of the following best predicts why humans and mice have identical telomeric repeat sequences? Facts about the test: The AP Biology exam has 60 multiple choice questions and you will be given 1 hour C. Most of the species found in the first static period will be absent in the second static period. In addition to the ABO blood groups, humans have an MN blood type system in which the M and N alleles are codominant to one another. The logging industry created vast meadow habitats for the sparrow in the late 1800s. WebClick the card to flip . The presence of MC1RdMC1Rd alleles in the East lava flow population is an indication of gene flow from mice populations living on light granite rocks. The second group is fed the same food without the mutagen. The darker backgrounds conferred a selective advantage to the black variety, as described by natural selection. 3.6-9b) results. Based on the data in Table 1, which of the following best describes the relationship between the MC1R gene and coat color in the Carrizozo, New Mexico, rock pocket mouse population? Observed modern extinction rates will resemble the rates found early in previous extinctions. Bacteria and eukaryotes use different mRNA codons for the same amino acids during translation. Continue treating the three insect populations with the same insecticides and determine whether their efficiencies decline significantly after several generations. There is no difference in iridium levels in sediments that were deposited on Earth 3.6 billion years old, compared to recent sediments. The researchers built an enclosure to prevent migration into and out of the O'Neill rock pocket mouse population for a period of two years. Which of the following represents an alternate hypothesis tested by this experiment with regard to the population sizes of Henslow's sparrows? After 20 generations of allowing this population of about 1000 flies to mate randomly, 10 females and 10 males were isolated from the rest of the population. D. The number of species present on Earth will equal the number of species on Earth after the last extinction. This hypothesis states that the first genetic material was RNA, not DNA, and a transitional period led to the emergence of DNA as the storage molecule for genetic material. A. Which of the following predicts the expected outcome of the experiment? If sediment layers that are 3.6 billion years old are tested, they will contain relatively high iridium levels, because that is when many meteorites crashed into the Earth. The SinoHimalayan fern, Lepisorus clathratus is widely distributed on the QinghaiTibetan plateau. WebProgress checks help you gauge student knowledge and skills for each unit through: multiple-choice questions with rationales explaining correct and incorrect answers, and; Which of the following best predicts the impact on the lizard species if there is a gradual increase in the average temperatures found in both the lowlands and mountains in this region? Dark color is selected for in mice from the West, Mid, and East populations. Scientists determined the frequencies of the M and N alleles in five localized and stable human populations in the Philippines, Immigration of individuals from Metro Manila into the two populations. Which of the following best describes what occurred during the periods indicated by the arrows? Are the following statements true or false? C. Controlled fires in counties 6 and 8 will have no effect on the sparrow populations. Two drag forces act on a bicycle and rider: FD1F_{\mathrm{~D} 1}FD1 due to rolling resistance, which is essentially velocity independent; and FD2F_{\mathrm{~D} 2}FD2 due to air resistance, which is proportional to v2v^2v2. few individuals become isolated from a large population and establish a new small population with a gene pool that differs from the large population. To prevent the loss of genes as chromosome ends wear down during DNA replication, the tips of eukaryotic chromosomes have specialized DNA "caps" called telomeres. Geologic events such as mountain building can directly affect biodiversity. Start each population with genetically identical bacterial cells from a single culture to make sure that the initial genetic variation in all of the populations was exactly the same. Which of the following best describes what occurred during the periods indicated by the arrows? Which of the following student claims is best supported by the data provided? z=ycos(xy),(2,2,2)z=y \cos (x-y), \quad(2,2,2)z=ycos(xy),(2,2,2), Write the electron configuration of the ion. Because cheetahs, Acinonyx jubatus, experienced a bottleneck event about ten thousand years ago, living cheetahs exhibit very little genetic variation compared to other living species of large cats. C. Restriction enzymes in the cytoplasm of the bacteria degrade linear DNA. Students used an online database, which used the structure of catalase from different species, to generate the phylogenetic tree shown in Figure 1. A. a) filtering blood of harmful substances. Population B was separated for a longer time from the original population than population A was, and population B evolved into a more distinct new species than population A did. Which of the following best explains the mechanism that caused this speciation event in the giant kangaroo rats of population A? Which of the following best explains the phenotypic pattern in the moths over time? When a population is reduced, new niches become available in the environment, which can trigger adaptive radiation. A. C. The plant species will flower earlier in the spring in response to rising temperatures before the arrival of the pollinators, so seeds will not be produced. A population of the species has the following allele frequencies: B=0.85 and b=0.15. Observed modern extinction rates will resemble the rates found early in previous extinctions. In addition to the ABO blood groups, humans have an MN blood type system in which the M and N alleles are codominant to one another. L_2=5 \mathrm{~m}, \quad \bar{\delta}=1 \mathrm{~mm} Which of the following student claims is best supported by the data provided? B. During the last few decades, tall buildings have been built around the woodlot, and species 3, 4, and 5 are shadeintolerant plants. The plant species will flower earlier in the spring in response to rising temperatures before the arrival of the pollinators, so seeds will not be produced. Future generations will eventually completely lose the a allele from the gene pool. Which of the following best describes what occurred during the periods indicated by the arrows? In an experiment, the scientist creates two groups of twenty highly inbred mice. The SinoHimalayan fern, Lepisorus clathratus is There is a progression of pathways in organisms found in Bacteria, Archaea, and Eukarya. A scientist is studying the impact of mutagens on genetic variation in mice. B. Natural selection acted on variation that was present in both populations A and B, and the lack of gene flow eventually led to the formation of two new species. The MC1RD allele is not responsible for dark coat color in the Carrizozo population, so the dark coat color is likely a result of convergent evolution. After 20 generations of allowing this population of about 1000 flies to mate randomly, 10 females and 10 males were isolated from the rest of the population. Which of the following represents an alternate hypothesis tested by this experiment with regard to the population sizes of Henslow's sparrows? B. WebAp Bio: Unit 7 Progress Check: MCQ describes how the L. clathratus population would be affected? The density of air is I.29kg/m3\mathrm{I} .29 \mathrm{~kg} / \mathrm{m}^3I.29kg/m3. Which of the following conditions of Hardy-Weinberg equilibrium was most likely not met in the northern elephant seal population following overhunting? A. Which statement below best states an alternative hypothesis Fox could have used to frame his research? B. Immigration of individuals from Metro Manila into the two populations, Which of the following best explains the trend shown in Figure 1? One group is given food with an added substance that is known to be a mutagen. In an experiment, the scientist creates two groups of twenty highly inbred mice. A. The second group is fed the same food without the mutagen. These alleles code for glycoproteins that act as antigens on the red blood cells. Controlled fires in counties 4 and 5 will lead to an increase in the sparrow population. The two populations will show significant genetic differences because the founder effect will result in significant losses in diversity in the smaller population. In the presence of available energy and the absence of a significant quantity of atmospheric O2 simple proteins will form spontaneously from a mixture of amino acids. A captive population of cheetahs kept in a confined area will have a greater risk of contracting and passing on a virus. B. After rearing five additional generations of the mice on this new food, the two groups are assessed for how efficiently this new food is digested. B. The results of breeding programs can be seen in the change in winning times of the Kentucky Derby from 1880 to the present, as shown in Figure 1. There are two species of elephant seals: northern elephant seals, Mirounga angustirostris, found off the western coast of North America from Baja California to the Gulf of Alaska, and southern elephant seals, M. leonina, found in the southern oceans. Geographic isolation will create separate gene pools, leading to speciation over time. If a fire caused the surface of the ground in the habitat of the species to become darker in color, which of the following claims about the impact on the allele frequencies in this population is most reasonable? During the last few decades, tall buildings have been built around the woodlot, and species 3, 4, and 5 are shadeintolerant plants. Given aerobic conditions and large amounts of lightning, amino acids will spontaneously form crude proteins. Some lizards will migrate to new habitats in the mountains and become isolated, leading to allopatric speciation. Which of the following best predicts the impact on the lizard species if there is a gradual increase in the average temperatures found in both the lowlands and mountains in this region? A group of researchers noticed that using a particular drug to treat cancer in mice would reduce the size of the tumor, but some of the tumor cells appeared to be resistant to the drug since some of these cells would increase in number over time. Which of the following is closest to the frequency of the MC1RDMC1RD allele in the Tule Mountain population?