Several new tetraploid species of a plant called salsify (Tragopogon) have arisen in western North America. These new species each arose from a diploid species that went through the process of allopolyploidy. This mode of speciation is a type of ________ and it occurs ________. A. allopatric speciation; almost instantaneously B. sympatric speciation; gradually C. allopatric speciation; very slowly D. sympatric speciation; quickly

Several new tetraploid species of a plant called salsify (Tragopogon) have arisen in western North America. These new species each arose from a diploid species that went through the process of allopolyploidy. This mode of speciation is a type of and it occurs . A. allopatric speciation; almost instantaneously B. sympatric speciation; gradually C. allopatric speciation; very slowly D. sympatric speciation; quickly

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter20: Speciation And Macroevolution

Section: Chapter Questions

Problem 6TYU: Which of the following evolutionary processes is associated with allopolyploidy? (a) gradualism (b)...

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Which of the following factors would not contribute toallopatric speciation?(A) The separated population is small, and genetic drift occurs.(B) The isolated population is exposed to different selectionpressures than the ancestral population.(C) Different mutations begin to distinguish the gene pools ofthe separated populations.(D) Gene flow between the two populations is extensive.
Hybridization between incompletely isolated populations a. always leads to reinforcement due to the inferiority of hybrids. b. can serve as a mechanism for preserving gene flow between populations, thus preventing speciation. c. only occurs in plants. d. never affects rates of speciation.
Part A: To which other species of storm-petrel is H. matsudairae, the cold-season breeder on Japan, least closely related? A. H. monteiroi B. H. monorhis C. H. tristrami Part B: What does the phylogeny suggest about a primary reproductive barrier that exists between H. matsudairae and H. monorhis to allow speciation to occur? A. Mechanical B. Gametic barrier C. Temporal D. Nesting on different islands
The goldenrod gall fly mates and lays its eggs on the goldenrod plant and the larva live inside the plant. When a new species of goldenrod (goldenrod B) moves into the range of the fly some of the flies move to goldenrod B. How does this process allow for sympatric speciation of the flies? Group of answer choices A. the two plants have different chromosome numbers B. the flies only reproduce on their host plant C. hybrids are always more successful than either type of fly D. a predator keeps the two types of flies separated E. the two plants occur in different geographic areas
Some species undergo polyploidy, which is a multiplication of their chromosomes. That is, they contain full chromosomes from each parent. How could speciation affect a polyploid organism? A. The polyploid organisms may experience gametic isolation. B. The polyploid organisms may experience behavioral isolation. C. The polyploid organisms may experience geographic isolation. D. The polyploid organisms would not be affected by speciation.
All of the following are examples of prezygotic isolation except? A.) Two closely related species of flowering plants that release and are receptive to pollen at different times B.) Two closely related species of squirrels, one that lives and breeds in woody meadows and another that lives and breeds in the forest interior C.) Two closely related species of song birds whose hybrid embryos die early in development D.) Two closely related species of spiders that have different, species specific, binding proteins on their gametes
Part A: To which other species of storm-petrel is H. matsudairae, the cold-season breeder on Japan, least closely related? A. H. monteiroi B. H. monorhis C. H. tristrami Part B: What does the phylogeny suggest about a primary reproductive barrier that exists between H. matsudairae and H. monorhis to allow speciation to occur? A. Mechanical B. Gametic barrier C. Temporal D. Nesting on different islands Part C: What does the phylogeny suggest about the likely mechanism of speciation between H. matsudairae and H. monorhis in Japan? A. Allopatric speciation B. Sympatric speciation What's the rationale? What does the phylogeny suggest about the likely mechanism of speciation between H. hornbyi and H. homochroa in the eastern Pacific? A. Allopatric speciation B. Sympatric speciation What's the rationale?
Which is a criticism of sympatric speciation? A.) many cases of sympatric speciation are actually microallopatry B.) allopatric speciation is less common and scientists should focus more attention on locating additional examples C.) sympatric speciation is only associated with changes in ploidy, a process so rare that it's relatively unimportant D.) since most examples of sympatric speciation involve post zygotic isolation, hybridization nearly always results in their reversal
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