Term
| the human races are completely isolated |
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Definition
| races of humans are unlikely to evolve differences in the future because... |
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Term
| depletion of atmospheric ozone |
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Definition
| causes an increase in the intensity of UV radiation reaching the earth |
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Term
| a new species form most of its unique features as it comes into existence and then changes little for the duration of its existence |
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Definition
| position held by an adherent of the punctuated equilibrium theory |
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Term
| strengthen postzygotic barriers between horses and donkeys |
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Definition
| theoretically, the production of sterile mules by interbreeding between female horses and male donkeys should... |
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Term
| extinction of both species as the hybrid persists |
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Definition
| the constantly changing nature of the appalachian ground crickets hybrid zone favors... |
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Term
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Definition
| a new species accumulates most of its unique features as it comes into existence |
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Term
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Definition
| an area where mating occurs between members of two closely related species, producing viable offspring |
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Term
| share a common ancestor recently in evolutionary time |
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Definition
| two very closely related species that have diverged from each other quite recently... |
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Term
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Definition
| largest unit within which gene flow can occur |
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Term
| converting ammonium to nitrate, which plants absorb |
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Definition
| nitrifying bacteria participate in the nitrogen cycle mainly by... |
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Term
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Definition
| reproductive isolation represented by: males of different species of the fruit fly that live in the same parts of the hawaiian islands have different elaborate courtship rituals that involve fighting other males and stylized movements that attract females |
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Term
| speciation occurred rapidly in geologic time |
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Definition
| according to the concept of punctuated equilibrium, the "sudden" appearance of a new species in the fossil record means that... |
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Term
| morphological species concept |
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Definition
| various species new to science and have not yet been described. separate them into species. there is no accompanying information as to where or when they were collected. which species concept must be used? |
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Term
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Definition
| defining characteristic of allopatric speciation |
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Term
| biological species concept |
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Definition
| species concept that distinguishes two species based on the degree of genetic exchange between their gene pools |
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Term
| gene flow between distinct gene pools |
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Definition
| should decline in hybrid zones where reinforcement is occurring |
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Term
| the postzygotic barrier called hybrid inviability |
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Definition
| two species of frogs from the same genus occasionally mate, but the offspring they produce fail to develop and hatch. what mechanism is keeping the two frog species separate? |
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Term
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Definition
| the origin of a new plant species by hybridization, coupled with accidents during nuclear division, is an example of: |
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Term
| the burning of larger amounts of wood and fossil fuels |
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Definition
| the main cause of the increase in the amount of carbon dioxide in earth's atmosphere over the past 150 years is: |
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Term
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Definition
| describes carbon dioxide, methane, and water vapor re-reflecting infrared radiation back toward earth |
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Term
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Definition
| most new species accumulate their unique features relatively rapidly as they come into existence, then change little for the rest of their duration as a species |
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Term
| reproductive isolation from one another |
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Definition
| will most likely guarantee that two closely related species will persist only as distinct biological species |
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