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.
Population Losses in the South, 1920–1930
Comparing Prison Inmates With The U.S. Population
How Fast is the World's Population Growing?
How to convert units of any rate to another (Part 2)
The Solow Model Incorporating Population Growth
Predicted Proportions in a Population