Haffer's hypothesis appears to explain the distribution of species

Question

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

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

Source:
Crackverbal

srignz · Answer

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

Below option explains the highlighted portion:    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

abhishekdadarwal2009 · Answer

Option E suggests that the more number of ice ages means that more number of isolation, and more isolations would create more diverse species.. because there are multiple chances/isolations.

UmangMe · Answer

more Isolation from more ice ages

sony1000 · Answer

Answer E brings in new information not mentioned on the argument. Answer E speaks of Amazon basin, no where in the argument Amazon basin is mentioned, the problem I have with E is that the other answer choices are crapy too. Also, E mentions high species , once again the argument does not say how many species developed, from the argument we can not conlcude it was a high number or a low number. of new species.

VivekSri · Answer

Hi It is all about to choose the best among all, so option E is one of the most apt, indeed there are new words introduced but the other option is no where in the line and we can say they are out of scope .
Main Idea:  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.
 
Let us take each option one by one:
A.Provide proof that cooler and drier temperatures were primarily responsible for the distribution of species in the Amazon. ->  Conclusion is all about Geographical isolation which may lead to diversity because of changing climate. So Out of Scope. 
B.Explain how population of species was protected from extinction in the amazon basin -   No where it is written how it is protected. Rather the whole idea is how species is adopted with changing climate.  
C.Explain how most species were able to survive periodic climatic disturbances in the Amazon basin. -   The idea is how isolation of different species has facilitated the developing of new species.   
D.Suggest that certain types of climatic disturbances cause more species diversity than other types of climatic disturbances.   There is no where comparison of different type of climate disturbances.  
E.Suggest that geographical isolation may have occured often enough to cause high species diversity in the Amazon basin.  yes amazon basic is new but idea is intact.

MSri0305 · Answer

"Amazon basin" is mentioned in option E which is not a part of the actual argument and hence should have been eliminated on the grounds of being beyond the scope. Then why is option E correct?

MartyTargetTestPrep · Answer

(E) isn't really correct. This question is a busted question.

pudu · Answer

E is correct because other 4 can be rejected easily. Something is missing in this question.

napolean92728 · Answer

The correct answer is:  E. Suggest that geographical isolation may have occurred often enough to cause high species diversity in the Amazon basin. 
Explanation:
The paragraph discusses  Haffer's hypothesis , which proposes that  ice age refuges  protected species from extinction  and  that  periodic geographic isolation,  caused by repeated ice ages,  led to the development of new species . The reference to  13 ice ages  emphasizes that  such isolations occurred frequently , thereby  increasing opportunities for speciation  (i.e., formation of new species).

Why are other options incorrect:
 A. Provide proof that cooler and drier temperatures were primarily responsible for the distribution of species in the Amazon 
 
  Incorrect : While the hypothesis involves climatic changes, the focus is on  geographic isolation due to climate , not directly attributing  cooler/drier temperatures as the  primary  cause  of species distribution.  
 B. Explain how the population of species was protected from extinction in the Amazon basin 
 
  Incorrect : This is only  part  of the explanation. The mention of ice ages is  more connected to the development of new species , not just survival.  
 C. Explain how most species were able to survive periodic climatic disturbances in the Amazon basin 
 
  Incorrect : Again, survival is mentioned, but the  primary focus of mentioning 13 ice ages  is to  show repeated isolation events , which led to  greater diversity , not just survival.  
 D. Suggest that certain types of climatic disturbances cause more species diversity than other types of climatic disturbances 
 
  Incorrect : The paragraph does  not compare different types of climatic disturbances . It only discusses  ice ages  and their effects; no comparison is made.

PSKhore · Answer

The author mentions the number of ice ages in order to E. Suggest that geographical isolation may have occurred often enough to cause high species diversity in the Amazon basin. 
Explanation: The paragraph explains Haffer's hypothesis, which suggests that repeated ice ages caused geographic isolation, leading to speciation (the development of new species). The author uses the estimated number of ice ages to emphasize how frequently these isolation events likely occurred, supporting the idea that this mechanism could have driven the high biodiversity seen in the Amazon.

Haffer's hypothesis appears to explain the distribution of species

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Haffer's hypothesis appears to explain the distribution of species

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