. (07.07 HC)Darwin explored the Galapagos Islands and observed variations of certain species. Forexample, he saw that the mockingbirds on three different islands were distinct but stillsimilar to the mockingbirds found on the mainland. The level of diversity in anecosystem can be determined by the frequency of speciation and extinction. (8 points)a. Describe speciation and identify two possible prezygotic barriers of themockingbirds that contribute to speciation.b. If the mockingbirds became extinct, explain how this could lead to adaptiveradiation. Σ19. (07.05 MC)Which of the following best describes evidence from biochemistry that a geneticiststudying evolutionary relationships might use to determine that two species are notclosely related? (4 points)Each species has a different reproductive mechanism.One species has genetic material that contains different nucleotides.Similar gene sequences in each species code for different proteins.○ The two species have different numbers of chromosomes.

Detailed explanation: 1. Each species has a different reproductive mechanism: This relates to…

Answered: . (07.07 HC) Darwin explored the…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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A.) Based on the graph, determine whether or not the fruit fly population is evolving. Justify your answer? B.) Described the frequency of the recessive allele over time. Make a hypothesis to explain what has affected the frequency of the recessives allele over time?
A mountain range divides a freshwater snail species into two large isolated populations. Erosion eventually lowers the range and brings the two populations together again, but when they mate, the resulting hybrids all produce sterile young. This scenario is an example of: O A. allopatric speciation by vicariance. O B. sympatric speciation. C. parapatric speciation. D. allopatric speciation by peripheral isolation. « » A Moving to another question will save this response. 8:02 AM 11/10/20 a 18 hp 近

The Galapagos Islands are inhabited by organisms that are similar to the organisms on the mainland of South America but they have specific characteristics that set them apart. One of the most famous groups of organisms that has been studied has been the finches. There are at least 13 different species of ground finches found throughout the Galapagos, most likely all coming from a common ancestor that arrived from the mainland of South America in the distant past. Which of the following explanation accurately explains the variation of finches on the Galapagos Islands? Question options: Divergent evolution has occurred because the finches all share characteristics that are similar to the common ancestor but differ because each species occupies different niches that require different characteristics to survive. Convergent evolution has occurred because the finches do not share characteristics that are similar to the common ancestor and differ because each species occupies…
1. In island radiations we often see the following pattern: similar forms found in different species living in similar habitats on different islands. This pattern raises the question: did the form evolve once on a single island in a single species and then spread to multiple islands by dispersal (let’s call this the “dispersal model”)? Or did a single species first disperse to different islands, then ecologically adapt to the many different environments on each (let’s call this the “convergence model”)? A phylogeny can help us identify which of these processes is at play. Considering the three traits shown on this tree, which model appears to have more support: the dispersal model or the convergence model? Explain how you arrived at this conclusion.
A small number of animals moves away from a large ancestral population on the continental mainland and colonizes an island. Which of the following is likely to occur? A. Genetic diversity will decrease on the mainland, because of a population bottleneck. B. Alleles that were more rare on the mainland are likely to become more common on the island, because of the founder effect. C. Genetic diversity will be lower on the island than the mainland, because of the founder effect. D. Mutations rates will increase on the island, in response to selection pressures in the new environment.
In nature, when a lone male lion encounters a pride (a group of lions with a male leader), the two males will often fight to become head of the pride. It has been documented that if the foreign lion wins the battle, he will usually kill the offspring of the weaker lion’s pride. This natural selection process best describes; Select one: a. Fitness within species b. Bottleneck effect c. Macroevolution d. Microevolution e. Speciation
Place the following events in the order in which they are most likely to occur by numbering them from 1 to 5. a. Speciation occurs. b. Genetic divergence takes place. c. Geographic barrier arises. d. Gene ﬂow is discontinued. e. Species adapts to a new environment.
18. (07.07 HC) Due to its location, Hawaii does not have very many land birds. The Hawaiian honeycreepers are a favorite for many ornithologists. There are over 50 species of honeycreepers that can all be traced back to one ancestor. The level of diversity in an ecosystem can be determined by the frequency of speciation and extinction. (8 points) a. Describe speciation and identify two possible prezygotic barriers of the Hawaiian honeycreepers that contribute to speciation. b. If the Hawaiian honeycreepers became extinct, explain how the newly available niches could lead to speciation.
4.9
Which of the following statement about the outcome of the evolution of a new species through hybridization is false? a.The new species may have traits that allow it to inhibit environments different from both parental species. b.The new species is always an intermediate of the two parental species c.The new species may have greater genetic diversity and greater trait diversity than the parental species. d.None of the above What are the two ways of looking into evolution in detail? a.Micro frequency change and ascent with modification b.Genotypic and phenotypic modification c.DNA frequency change and inheritance modification d.Allele frequency change and descent with modification Natural selection increases the frequencies of advantageous alleles and decreases deleterious alleles' frequencies. What are the three categories of natural selection depending on the favored traits? a.Directive, selective and native b.Indicative, normative and fixative c.Directional, stabilizing and…
(c) The Figure given below shows a population of guppies, living in an aquatic environment with coarse gravel, previous to (A) and then several generations after the introduction of a predator (B). Figure 2: Phenotypic presentation of guppies, pre- (A) and post- (B) introduction to predatory fish Explain, with the appropriate diagram, which type of natural selection is evident in this guppy population and why this adaptation is advantageous to the guppy.
Both a beetle and a lobster are arthropods, a monophyletic group of animals that have an exoskeleton with jointed appendages. Both the lobster and the beetle have antennae, modified legs that serve as sensory structures. Antennae were also found in the common ancestor of beetles and lobsters. This is an example of…. Group of answer choices A. allopatric speciation B. intrasexual selection C. intersexual selection D. convergence E. homology

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