What does a total fertility rate that is less than 2.1 indicate?
A) that a population has no natural growth
B) that a population is growing slowly
C) that a population is growing quickly
D) that a population has reached its peak
E) A TFR that is less than 2.1 has no particular significance.
Question 2
How does an open system contrast with a closed system?
An open system is open to scientific scrutiny, while a closed system is not.
An open system is able to convert energy from one form to another, while a closed system is not able to do so.
An open system is prone to collapse, while a closed system is typically more sustainable in the long term.
An open system exchanges energy and/or materials with its surroundings, while a closed system does not.
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