Environmental Science

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1. The age structure for the US was a pyramid indicating that our population is still growing.  Give one reason why our growth is slowing and one reason why we are still have a pyramid age structure.


2. Explain why organisms like trees and sea turtles have a Type III survivorship curve while most mammals have a Type 1 survivorship curve.

 
 

3.  Give 4 reasons why humans might have either a Type I or Type III survivorship

curve.

 
 

4.  For each distribution pattern in slide #23, list the factors from slide #22 that would account for that pattern for each of the three patterns

 
 

5.  What might account for a developed nation having a pyramid age structure?

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