.. The following comic shows geographic isolation. If speciation occurred among the two different populations, would this be an example of sympatric or allopatric speciation? How do you know?
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- A physical barrier separates a single species, causing two separate populations to form. Over time these two populations adapt to their environments. Eventually, these two populations are no longer able to successfully reproduce with each other. This is known as __________. A. Sympatric speciation B. Allopatric speciation C. Autopatric speciation D. Parapatric speciationWhich of the following statements is false? a. Gradual speciation is most likely to occur in a large population that lives in a stable climate. b. Punctuated equilibrium is unlikely to occur in a large population that lives in a stable climate. c. Gradual speciation and punctuated equilibrium both result in the divergence of species. d. Gradual speciation is most likely to occur in a small population that experiences a rapid change in its environment.There is a fish species that lives in a lake. As the fish population grows, competition for food increases and a group of fish locates a new food source at a different depth in the lake. Over time, two populations with distinct morphologies that allow them to eat various food sources begins to occur in the lake. Which type of speciation (allopatric or sympatric) will mostly likely occur? Why?
- What is required for sympatric speciation to occur? A. Continuous gene flow between different populations B. Geographic separation of populations C. Two populations that are different begin to reproduce and create hybrids D. Emergence of a reproductive barrierSome females seem to prefer the blue color and some females seem to prefer yellow color. If this a diversifying/ disruptive selection, how could diversifying/disruptive selection result in sympatric speciation in this example?A population of chipmunks lives across the length of a valley in the mountains. One day a large section of the mountain breaks off, and the resulting rockslide divides the valley in half. Over time, the chipmunks on either side of the rockslide evolve and become different species. What type of speciation is this?
- Which of the following is a good description of Sympatric speciation? A. Speciation without geographic isolation B. Changes in sequence of DNA of an organism C. Speciation due to geographical isolation D. The change in the genetic characteristics of a population of organisms over timeWhich of the following is an example of sympatric speciation? Group of answer choices a. birds moving to the far side of a mountain range b. squirrel populations on opposite sides of the Grand Canyon c. insects moving to new host plant species d. fish in two different lakesConsider this example. Shorebirds on the Eastern coast of North America feed on the mollusks and tiny crabs along the shore. Birds with tougher beaks are better adapted to crack open the shells of the mollusks, and birds with sharper beaks are better adapted to pierce the shells of crabs. Over time, the shorebirds become two separate species that no longer breed with one another. What type of speciation has occurred? A. Sympatric speciation B. Adaptive speciation C. Microevolution speciation D. Allopatric speciation
- In which of the situations below would speciation be most likely to occur? You can choose more than one answer. a. Seven lemurs escape from an enclosure at Duke University. To everyone's surprise, they establish a small but viable population coexisting successfully with humans in a partly suburban environment very different from their native Madagascan habitat. b. Bighorn sheep occupy mountains from Canada to Death Valley in Southern California, interbreeding all along the way. The populations at the two ends of the range live in very different environments. c. A few individuals of a butterfly species were blown to an island during a severe storm. d. A population of juniper shrubs is split by the formation of a canyon. Every year, strong winds carry a small amount of the shrubs' pollen across the canyon.Is this a case where allopatric speciation might be completed to two biological species by natural selection for increased prezygotic isolation? Why or why not?When two populations are reproductively isolated, what else must occur for speciation to happen? (a) gene flow (b) genetic divergence (c) coevolution (d) convergent evolution (e) none of the above