4. When Asian rosefinches first arrived in the Hawaiian Islands (about 4.0 million years ago), they diversified into a number of different species on different islands. Since the Pacific Ocean was a barrier between these islands before the ancestral species first arrived, this represents which pre-zygotic barrier? A. allopatric isolation by means of vicariance B. gamete isolation C. mechanical isolation D. habitat isolation E. allopatric isolation by means of dispersal

4. When Asian rosefinches first arrived in the Hawaiian Islands (about 4.0 million years ago), they diversified into a number of different species on different islands. Since the Pacific Ocean was a barrier between these islands before the ancestral species first arrived, this represents which pre-zygotic barrier? A. allopatric isolation by means of vicariance B. gamete isolation C. mechanical isolation D. habitat isolation E. allopatric isolation by means of dispersal

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter22: Speciation

Section: Chapter Questions

Problem 9TYK: An animal breeder, attempting to cross a llama with an alpaca for finer wool, found that the hybrid...

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An animal breeder, attempting to cross a llama with an alpaca for finer wool, found that the hybrid offspring rarely lived more than a few weeks. This outcome probably resulted from: a. genetic drift. b. prezygotic reproductive isolation. c. postzygotic reproductive isolation. d. sympatric speciation. e. polyploidy.
The wings of birds, the legs of pigs, and the flippers of dolphins provide examples of: a. vestigial structures. b. homologous structures. c. acquired characteristics. d. artificial selection. e. uniformitarianism.
Which situation would most likely lead to allopatric speciation? Flood causes the formation of a new lake A storm causes several large trees to fall down A mutation causes a new trait to develop An injury causes an organism to seek out a new food source.
A characteristic that exhibits smooth changes in populations distributed along a geographical gradient is called a: a. ring species. b. hybrid. c. cline. d. hybrid breakdown. e. subspecies.
1.A small group of turtles float on a log to an island and establish a new population there. How do you expect the genetic diversity of the island turtles to compare to genetic diversity of the mainland turtle population they originated from? Group of answer choices A. Genetic diversity should be similar, since they are the same species. B. Genetic diversity should be higher for the island turtles, because the new environment will produce new alleles. C. Genetic diversity should be lower for the island turtles, since the island turtles represent a small sample of the genetic diversity from the mainland turtles. 2.If the probability of a turtle having a brown shell is 3/4 and the probability of a turtle having a bumpy shell is 1/4, what is the probability of a turtle that has a shell that is both brown andbumpy? Group of answer choices A. 3/16 B. 3/8 C. 3/4 D. 1/2 3. A Drosophila gene is on the X chromosome, and recessive mutations in this gene cause white eye color…
1. What is the term describing the process that occurs when a species evolves into a new species with a physical barrier separating populations? a adaptive radiation . geographic isolation b. coevolution c. Geographic isolation d. Mutation
11. A small group of finches from the mainland United States get blown off course during a hurricane and are focused to settle on an island off the coast of Georgia. Most of these birds have a recessive trait for yellow spots on their wings which is not a common trait among this speciet. Over several generations the entire population of these finches on the island have this expressive trait. This is an example of ____. A. cacogenesis B. anagenesis C. reproductive isolation D. the founder effect
4) The Biological Species Concept classifies a species based on a.the role the organism plays in the environment. b.reproductive characteristics c.both morphological characteristics and reproductive isolation. d.genetic relationships between an organism and its ancestor. e.morphological characteristics
1. Which among the following is NOT a principle of natural selection? a. The DNA sequence of the organism will change. b. The characteristics of organisms are inherited or passed from parent to offspring. c. Offspring vary among each other about their characteristics, and those variations are inherited. d. More offspring are produced than can survive. 2. Tawilis is a freshwater sardine endemic only in the Taal Lake in Batangas province. After several eruptions of the Taal volcano in the 21st century, the sardine population mentioned above rapidly dropped up to 82%. What best describe this scenario? a. mutation b. migration c. natural selection d. genetic drift
2. When new species formed because gene flow was blocked by a physical barrier, this is considered... Group of answer choices a.allopatric speciation b.polyploidy c.sympatric speciation
1.A) Adaptations to a Changing Environment• Explain why it is necessary for organisms to have the ability to adapt.• Why is the current environment making it difficult for organisms to adapt?• Explain how organisms develop adaptations.2. B) Artificial Selection• Explain how artificial selection is like natural selection.• Why are quail useful subjects for an experiment on selection? What other organisms share similar characteristics?
1. Which of these populations has all the characteristics needed to evolve by natural selection? A. a population of lizards may be brown or red. The temperature of the eggs determines the color of the baby lizards, and a brown parent lizard is equally likely to give birth to either color of offspring. B. a population of spiders includes individuals that build their webs in triangle shapes and others that build their webs in round shapes. They inherit their web-building strategies from their parents and all shapes are equally successful at catching insects. C. some gazelles are capable of running faster than others, a skill that is partially genetic Faster gazelles tend to live longer and have more offspring. A. Population A B. Population B C. Population C 2. Your friend asks you "If evolution is real, why aren't humans perfectly adapted by now! why do people still get heart disease and cancer and die?" Which of these would be an accurate response you could give? A. Evolution only…