After several generations, both groups of mice are given a new type of food that is harder to digest than the previous food. Which of the following statements includes a reasonable refinement that researchers could use in repeating the experiment? Which of the following best explains the impact of these new selective pressures on the organisms involved? A scientist maintains a large population of the fruit fly Drosophila affinis in the laboratory. Which of these would be an appropriate null hypothesis to test related to whether meteorites hit the Earth 3.6 billion years ago? The remaining members of the population are allowed to randomly mate with one another to produce generation 2 and future generations. Based on the phylogenetic relationships shown in Figure 1, which of the following best explains the similarities exhibited by whales, bony fishes, and cartilaginous fishes? The two populations will show significant genetic differences because the founder effect will result in significant losses in diversity in the smaller population. Cells with flagella were better able to find food and escape predators. Convergent evolution, because these organisms do not share a recent common ancestor. Given aerobic conditions and large amounts of lightning, amino acids will spontaneously form crude proteins. 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 ? Facts about the test: The AP Biology exam has 60 multiple choice questions and you will be given 1 hour C. Random mating within each population Students created a model showing one possible mechanism for speciation in which a geographic barrier separated one large population into two smaller populations, A and B. A scientist believes that the first organic molecules may have come to Earth on meteorites 3.6 billion years ago. The darker backgrounds conferred a selective advantage to the black variety, as described by natural selection. Whales, bony fishes, and cartilaginous fishes all have similar adaptations that enable them to live in the ocean. Increasing the number of trials and the number of mice in each treatment group. WebAp Bio: Unit 7 Progress Check: MCQ describes how the L. clathratus population would be affected? D. Specimen 4. Which of the following best predicts the effect of the enclosure on the O'Neill population? John David Jackson, Patricia Meglich, Robert Mathis, Sean Valentine, David N. Shier, Jackie L. Butler, Ricki Lewis. A. B. A. Which of the following student claims is best supported by the data provided? C. If a sediment layer that is 3.6 billion years old is tested, it will contain organic material. D. By 1940, most genetic variation for speed had been lost from the gene pool. Scientists are concerned that the lowlands will become much warmer by the end of the twenty-first century and will become unsuitable for this lowland lizard species. E_1=E_2=200 \mathrm{GPa}, \quad \alpha_1=\alpha_2=12 \times 10^{-6} /{ }^{\circ} \mathrm{C} \\ All of the selective breeding programs ended in 1940. The flow rate of ammonia at 10C(=624.6kg/m310^{\circ} \mathrm{C}\left(\rho=624.6 \mathrm{~kg} / \mathrm{m}^3\right.10C(=624.6kg/m3 and =1.697104kg/ms\mu=1.697 \times 10^{-4} \mathrm{~kg} / \mathrm{m} \cdot \mathrm{s}=1.697104kg/ms ) through a 222-cm\mathrm{cm}cm-diameter pipe is to be measured with a 1.51.51.5-cm\mathrm{cm}cm-diameter flow nozzle equipped with a differential pressure gage. D. The animals in population A mate at different times of year, causing their gametes to be incompatible with those from animals in populations B, C, and D. B. Scientists interested in the relationship among vision, foraging for food, and fitness studied three isolated populations of a small species of primate whose A. Introns must be removed from eukaryotic DNA before the gene is inserted into the plasmid. The same species will be found in both static periods, but they will have different shell shapes. The M4 and M5 populations have the lowest genetic diversity of all populations. describes how the L. clathratus population would be affected? Human activities can drive changes in ecosystems that affect the risk of extinction. D. Migrating pollinators will start migrating later in the year, switching from spring-flowering plants to summer-flowering plants. Hunting in the nineteenth century has been blamed for a drastic reduction in the northern elephant seal population. Which of the following would be an appropriate alternative hypothesis? few individuals become isolated from a large population and establish a new small population with a gene pool that differs from the large population. The genotypes BB and Bb result in dark-colored fur, the genotype bb results in light-colored fur. Because the mice are highly inbred, they are essentially identical to one another. Which of the following best explains the divergence in morphology in the birds? provided unique evolutionary advantages to the last eukaryotic common ancestor? The second group is fed the same food without the mutagen. D. Start each population with bacteria that differ from one another by a single mutation to ensure that the initial genetic variation in all populations is known. Which of the following best explains the phenotypic pattern in the moths over time? The degrees of relatedness in several native populations of prairie chickens in Marion and Jasper Counties in Illinois were determined. Which of the following best explains the trend shown in Figure 1? 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. A. D. Bacteria and eukaryotes use different mRNA codons for the same amino acids during translation. C. Start each population with bacterial cells that have different genotypes to make sure there is enough genetic variation for selection to occur. One facet of the study of the origin of life focuses on the nature of the first genetic material. The heterotroph hypothesis of the origin of life states that basic organic building blocks formed from inorganic molecules under the primitive conditions present early in Earth's development. C. The woodlot is shaded, with little direct sunlight, and species 3, 4, and 5 are shade-intolerant canopy trees. Both the larger population and the isolated population were maintained under identical conditions and allowed to mate randomly for another 20 generations. B. C. Restriction enzymes in the cytoplasm of the bacteria degrade linear DNA. D. The group fed the mutagen will show a decrease in the ability to digest the new food, because the mutagen prevented natural selection from acting on them. These building blocks combined to form polymers, such as crude proteins. A dark coat color provides camouflage to mice on the lava flow rocks; therefore, mice with dark coats have a lower predation rate in that habitat. WebDownload free-response questions from past AP Biology exams, along with scoring guidelines, sample responses from exam takers, and scoring distributions. When a population is reduced, new niches become available in the environment, which can trigger adaptive radiation. Which of the following best explains the divergence in morphology in the birds? There is no difference in iridium levels in sediments that were deposited on Earth 3.6 billion years old, compared to recent sediments. Which of the following best explains the mechanism that caused this speciation event in the giant kangaroo rats of population A? 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. C. Organisms in Bacteria, Archaea, and Eukarya each have adenine, thymine, guanine, and cytosine bases forming their DNA. The M4 and M5 populations have the lowest genetic diversity of all populations. Which of the following sets of data provides evidence that best supports common ancestry for organisms in all three domains? 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. The researchers wish to increase the reliability of their experimental observations before investigating new claims that chemotherapy-resistant tumors are an example of continuing evolution. The current global warming trend is placing new selective pressures on the species involved in these relationships. In an experiment, the scientist creates two groups of twenty highly inbred mice. In an experiment, the scientist creates two groups of twenty highly inbred mice. After several generations, both groups of mice are given a new type of food that is harder to digest than the previous food. 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? B. A. Cells with mitochondria were able to utilize metabolic energy more efficiently. Populations J1 through J5 are located in Jasper County. B. 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. A. The increased air pollution of the nineteenth century due to the use of coal led to a darkening of surfaces from soot. This one-line file will contain letter grades separated by blanks.Your function should print the distribution of grades, as shown. A shift to less polluting fuel in the twentieth led to cleaner air and a lightening of the moth's normal habitat. The frequency of homozygous recessive individuals will increase because light-colored fur absorbs less heat. 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? 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. Some plant species flower in response to increasing daily temperatures in the spring. Which of the following would be an appropriate alternative hypothesis? Does this exceed the (24-hr) air quality standard of 0.14 ppm? 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? During the last few decades, tall buildings have been built around the woodlot, and species 3, 4, and 5 are shadeintolerant plants. Which of these would be an appropriate null hypothesis to test related to whether meteorites hit the Earth 3.6 billion years ago? Iridium is an element that is rare on Earth but commonly found in meteorites. Which of the following best illustrates the change in the frequencies of the A and a alleles from generation 1 to generation 2 and to future generations, assuming Hardy-Weinberg equilibrium is present after generation 1 ? Dark coat color provides camouflage to mice on the flow; therefore, mice with dark coats predation rate in that habitat. Which of the following best explains the impact of these new selective pressures on the organisms involved? white circle, grey circle, black circle, John David Jackson, Patricia Meglich, Robert Mathis, Sean Valentine, Dental Radiography 5th Ed Ch 14 - Legal Issue. At that time, the moths, normally white with black speckles, known as the peppered variety, became less common than the solid black variety. 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. WebUnit 7 MCQ 4.9 (31 reviews) Flashcards Learn Test Match Which of the following best describes the processes occurring between the mouse populations and their (a)(a)(a) What is the angular momentum of a 2.8kg2.8 \mathrm{~kg}2.8kg uniform cylindrical grinding wheel of radius 28cm28 \mathrm{~cm}28cm when rotating at 1300rpm1300 \mathrm{rpm}1300rpm ? B. Select the best alternate hypothesis to support this claim. B. However, an additional mutation in the black allele changed it from a dominant to a recessive allele at the turn of the twentieth century, leading to a return to the dominance of the original peppered variety. Select the best alternate hypothesis to support this claim. Which of the following is closest to the frequency of the MC1RD allele in the Tule Mountain population? Which of the following best describes the processes occurring between the mouse populations and their environments? D. During the last few decades, tall buildings have been built around the woodlot, and species 3, 4, and 5 are shadeintolerant plants. 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. protein template that matches proteins found on the primitive Earth added to a mixture of deoxyribonucleotides will produce double-stranded DNA molecules. The geneticist determines the genotypes for a particular trait of all of the mice in the population during generation 1 and then removes all of the mice with the genotype aa. Which of the following best explains the phenotypic pattern in the moths over time? Some scientists propose that due to human activity and climate change, a sixth mass extinction has already begun. Specimen 1 Specimen 2 Specimen 3 Specimen 4, . B. A population of the species has the following allele frequencies: B=0.85 and b=0.15. This preview shows page 1 out of 1 page. AP Biology Scoring Guide Unit 7 Progress Check: MCQ Part A Copyright 2017. The College Board. These materials are part of a College Board program. Use or distribution of these materials online or in print beyond your schools participation in the program is prohibited. Ap biology unit 1 test answers - anfk. There is no difference in iridium levels in sediments that were deposited on Earth 3.6 billion years old, compared to recent sediments. Increasing the number of trials and the number of mice in each treatment group. A. The telomeric repeat sequences for selected organisms are given in Table 1. The switch to increased transport by planes during the twentieth century reduced this gene flow. The original habitat had many available unoccupied ecological niches that were colonized by populations of the original species. Each of the fifteen genotypes shown in generation 1 and generation 2 represents 100 mice. 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.

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