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Haffer's hypothesis appears to explain the distribution of species

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Haffer's hypothesis appears to explain the distribution of species  [#permalink]

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New post 12 May 2018, 12:10
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  35% (medium)

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70% (01:48) correct 30% (02:16) wrong based on 57 sessions

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Haffer's hypothesis appears to explain the distribution of species as well as the unusual species diversity.The ice age refuges would have protected existing species from extinction.But the periodic geographic isolation of related populations(there have been an estimated 13 ice ages to date) would have facilitated the development of new species as existing species on the lowlands adopted to changing climates.

The author mentions the number of ice ages in the paragraph in order to:

A.Provide proof that cooler and drier temperatures were primarily responsible for the distribution of species in the Amazon
B.Explain how population of species was protected from extinction in the amazon basin
C.Explain how most species were able to survive periodic climatic disturbances in the Amazon basin
D.Suggest that certain types of climatic disturbances cause more species diversity than other types of climatic disturbances
E.Suggest that geographical isolation may have occured often enough to cause high species diversity in the Amazon basin

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Re: Haffer's hypothesis appears to explain the distribution of species  [#permalink]

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New post 12 May 2018, 12:25
Haffer's hypothesis appears to explain the distribution of species as well as the unusual species diversity.The ice age refuges would have protected existing species from extinction.But the periodic geographic isolation of related populations(there have been an estimated 13 ice ages to date) would have facilitated the development of new species as existing species on the lowlands adopted to changing climates.

Below option explains the highlighted portion: [no of] geographic isolation = development of new species
E.Suggest that geographical isolation may have occured often enough to cause high species diversity in the Amazon basin
Re: Haffer's hypothesis appears to explain the distribution of species &nbs [#permalink] 12 May 2018, 12:25
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Haffer's hypothesis appears to explain the distribution of species

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