A) hybrid sterility isolation.
B) postzygotic isolating mechanism.
C) F2 fitness isolation.
D) temporal isolation.
E) behavioral isolation. Temporal isolation refers to a type of prezygotic isolating mechanism that prevents interbreeding when two species reproduce at different times of the year or during different times of day.
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A) There is a period of no change interrupted by speciation.
B) Transitional fossils are less likely to be found.
C) It is difficult to determine when speciation occurred.
D) It often involves an isolated subpopulation.
E) Speciation often occurs rapidly. In the punctuated equilibrium model, speciation occurs rapidly after long periods of little to no change, making transitional fossils rare. Rapid speciation events can occur from isolated populations, but once fossils of the new species are discovered, it is relatively straightforward to determine the point in time at which the speciation event occurred.
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A) eras
B) periods
C) epochs
D) centuries
E) decades The geological timescale divides the history of life on Earth into eras, then periods, and then epochs.
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A) possess a common ancestor.
B) can interbreed but not produce fertile offspring.
C) are reproductively isolated from each other.
D) have a shared gene pool.
E) can interbreed and produce fertile offspring. Two species are closely related if they possess a common ancestor. The ability to interbreed, whether or not fertile offspring are obtained, does not necessarily indicate that the two species are closely related.
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A) allopatric speciation
B) adaptive radiation
C) sympatric speciation
D) both allopatric speciation and adaptive radiation
E) both sympatric speciation and adaptive radiation The Galápagos finches are usually presented as an example of adaptive radiation, a mechanism by which multiple species arise from a common ancestor. However, the speciation of the finches also involves allopatric speciation, in which the reproductive isolation of populations of finches resulted in their speciation. Thus, the speciation of finches in the Galápagos reflects both adaptive radiation and allopatric speciation.
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A) behavioral isolation
B) mechanical isolation
C) temporal isolation
D) postzygotic isolation
E) hybrid sterility Because female blue-footed boobies reject mates that do not perform the correct courtship behavior, this is an example of a behavioral isolation mechanism.
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A) the resulting species are reproductively isolated or not.
B) gene flow continues to occur or not.
C) two or three species result.
D) geographic isolation is required or not.
E) the new species are separated by a prezygotic or postzygotic isolating mechanism. The prefix allo- means "different," whereas the prefix sym- means "same." The root word of both terms, patria, loosely means "homeland." Thus, the two types of speciation are differentiated by whether or not geographical isolation is required-allopatric meaning "different homeland," and sympatric meaning "same homeland."
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A) Bacteria
B) Archaea
C) Eukarya
D) Bacteria and Archaea
E) Bacteria, Archaea, and Eukarya The domains Bacteria and Archaea contain prokaryotic organisms, while the domain Eukarya contains eukaryotic organisms.
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A) genus - family - order - class - phylum
B) phylum - order - class - family - species
C) genus - order - family - class - phylum
D) family - order - class - phylum - kingdom
E) domain - kingdom - phylum - class - order Domains are the most inclusive classification, while a species is the least inclusive. Thus, domain - kingdom - phylum - class - order is in the correct order from most to least inclusive.
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A) Jurassic
B) Cretaceous
C) Devonian
D) Triassic
E) Permian Dinosaurs first appeared during the Triassic period and flourished during the Jurassic period; then most became extinct at the end of the Cretaceous period, marking the end of the Mesozoic era.
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