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Question 46 of 60   1.667 Points
Rick works for an engineering company that builds roads worldwide. He should anticipate the greatest problems with seasonal freezing and thawing of the ground in which ecosystem?

 

   A. Alpine tundra.   
 

   B. Taiga.   
 

   C. Pampas.   
 

   D. Savanna.   
 

   E. Arctic tundra.   
Question 47 of 60   1.667 Points
Oprah is a biologist employed to conserve the Vancouver marmot, a rare Canadian mammal whose population size has shrunk to less than 100 animals. What risk should she be concerned about that is common to most such small populations?

 

   A. Flooding.   
 

   B. Inadequate food.   
 

   C. Inadequate nest sites.   
 

   D. Inbreeding.   
 

   E. Predation.   
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