Scientists think that the four species of finch shown evolved from a single 1 point species. Predict which of the factors MOST LIKELY contributed to the development of different beaks in these four birds? *
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- INTERPRET DATA The genotype frequencies of a population are determined to be 0.6 BB. 0.0 Bb, and 0.4 bb. Is it likely that this population meets all the conditions required for genetic equilibrium?NATURAL SELECTION NATURAL SELECTION IN INSECTS SUBMIT INTRODUCTION LABORATORY SIMULATION Lab Data PHASE 6: Polluted forest Moths G1 G2 G3 G4 Complete the following steps: Released G5 Тyрica 250 125 88 83 76 Select initial allele frequencies 29 Carbonaria 750 510 735 885 1042 1406 Click Next generation to wait a year Total 1000 635 823 968 for first generation of moths 1118 1435 Phenotype Frequency Click Capture moths to monitor population numbers Color Initial Frequency Frequency G5 Next generation Calculate phenotype frequencies in 5th generation. Record in Lab Data 4 Тypica White 0.25 Capture moths Carbonaria Black 0.75 Calculate allele frequencies in 5th Allele Frequency generation. Record in Lab Data Allele Initial Allele Frequency G5 Allele Frequency 6. Calculate genotype frequencies anc number of moths in 5th generation. 0.50 Record in Lab Data 0.50 Genotype Frequency Moths Initial Frequency Number of BELS Moths Genotype Color Released Frequency G5 Moths G5 q? Тypica dd White 250…Natural selection causes a shift in gene frequencies. What type of shift due to natural selection is represented here? Describe that type of natural selection and which data on these graphs support it. Chose one other type of selection and provide an example of how it is different from these graphs. Average 30 8.8 9.3 9.8 10.3 10.8 11.3 Beak depth Number of medium ground finches 25 20 15- 10 5 0 7.3 7.8 8.3
- n 1978, scientists studied how the fitness of marine sticklebacks would be affected if they were introduced into a freshwater environment. They collected 90 male and 90 female sticklebacks from a marine population and 10 male and 10 female sticklebacks from a freshwater population. The 200 sticklebacks were introduced into a freshwater environment that had no stickleback fish previously. Which of the following best describes the likely results of the scientists’ investigation of the fitness of the sticklebacks that were originally from a marine environment? The fitness of the sticklebacks from the marine environment increased because their chance of survival and reproduction is greater in the freshwater environment than in the marine environment. Answer A: The fitness of the sticklebacks from the marine environment increased because their chance of survival and reproduction is greater in the freshwater environment than in the marine environment. A The…Darwin’s finches have different beaks in terms of size and shape to be able to eat different food sources like insects, nectar, and seeds. Cactus finches have longer, more pointed beaks to probe cactus flowers compared to their relatives, the ground finches. If a plant disease killed a large portion of the cacti on the Galapagos islands, what would the future populations of finches look like in terms of beak size and shape? Use your knowledge of natural selection to determine which option is most likely. Ground finches would survive and pass on their shorter and wider beaks, so there would be a higher proportion of finches in future generations that have short and wide beaks. Ground finches would survive and pass on their beaks, but they would mate with the remaining cactus finches, creating a new hybrid that is somewhere between short versus long and narrow versus wide. Cactus finches would compete for food with ground finches and exhibit resource partitioning, so the beaks…As you know chimpanzees in neighboring groups in the forest show 4-5 times as much genetic difference as any two human populations. Is it reasonable to expect that trait that show genetic variation in humans, such as the structure of the hand and the brain, might show significant variation between chimpanzee populations? Why or why not?
- A population of ducks had dull orange bills and an average size of 18 inches from bill to tail. Over time, some researches noticed that the average size of the ducks was still 18 inches, but that now many ducks were either much smaller or much larger and no ducks were actually 18 inches long. The researcher correctly identified that the ducks were undergoing ___A___ selection for size, The researcher also noticed that the bills were a much brighter orange in the ducks, and correctly identified ____B____ selection for bill colouration. A few years later, the researcher returned and noticed that only the male ducks now had bright orange bills and the females were less bright. The researcher hypothesized that ____C____ selection was occurring. Question 4 options: 123 Disruptive 123 Sexual 123 Directional 1. A 2. B 3. CNaturalists who have accepted evolutionary theory now propose that: all of the items listed extinction occurs when the food supply becomes nutritionally unbalanced O populations of plants and animals in nature most often consist of individuals that are clones of each other populations of a species that become isolated from others by adapting to different environmental niches quickly become extinct those individuals whose variation gives them an advantage in staying alive long enough to reproduce are more likely to pass their traits on to the next generationAssuming Hardy-Weinberg equilibrium, in a population of white flowers (dominant allele) and red flowers, the white phenotypes make up 84 % of the population. What is the frequency of the white allele? 0.84 0.6 0.4 None of these answers. What characterized the lifestyle of mammals when dinosqurs dominated the vertebrate life on Earth? They were mostly small nocturnal predators. They were mainly large animals, aquatic and nocturnal species. They were mostly small and diurnal animals. None of these answers are true.
- population of 600 scorpions was split into four populations when irrigation canals were built through their habitat. The four new populations were called the Northern, Southern, Eastern, and Western populations. Each new population consisted of about 150 individuals. The four populations continued to evolve, and no migration occurred among populations. One hundred generations later, each population still has about 150 individuals, and a biologist investigates them. Consider what a biologist expect to see in the four populations after 100 generations if the environment did not change for any of the populations. Would the biologist agree or disagree with the following statements? question 1 agree or disagree Differences among the four populations probably occurred when populations adapted to specific environments, because most evolution results in adaptation. question 2 agree or not Each population would probably have the same number of alleles—that is, versions of genes—than it…Natural selection acts on phenotypes within a population. As a result, over time, the phe- notypic frequencies in a population can change. The graph below shows how the pheno- type of a population changed after selection occurred. Number of Individuals B Value of Phenotype A graph that shows how phenotypic frequency changed before and after selection. с population after selection Which of the following scenarios would most likely result in the phenotypic change shown in the graph above? D original population A A population of rats live on the ground and in short trees. A tree-dwelling snake that preys on the rats is introduced into the area. Warming of the arctic tundra reduces the average snow cover that lighter-colored arctic foxes rely on for camouflage. Darker-colored arctic foxes are better suited to the ex- posed moss and grass habitat. Robins that lay smaller-than-average clutches of eggs produce fewer viable offspring, while larger-than-average clutches of eggs result in…Which of these scenarios is an example of disruptive selection? Darker colored morphs in a butterfly population are more adaptive than lighter colored morphs, and lighter colored morphs are eliminated from the population. Intermediate gray morphs of a butterfly population are maintained, and the extreme dark and light color morphs have been eliminated. The dark and light color morphs of a butterfly population are maintained, and the intermediate gray morph has been eliminated from the population. A new, unique color form arises from a mutation in a population of butterflies.