3. Population Ecology
Human Population — Quiz
Test your understanding of human population with 5 practice questions.
Practice Questions
Question 1
Given a population age structure of 25\% aged 0–14, 60\% aged 15–64, and 15\% aged 65 and over, what is the dependency ratio?
Question 2
Based on the life table below, what is the net reproductive rate $R_{0}$?
Age 15–29: $l_{x}=0.8, m_{x}=1.5$
Age 30–44: $l_{x}=0.6, m_{x}=1.0$
Age 45–59: $l_{x}=0.4, m_{x}=0.5$
Age 60+: $l_{x}=0.2, m_{x}=0.1$
Age 15–29: $l_{x}=0.8, m_{x}=1.5$
Age 30–44: $l_{x}=0.6, m_{x}=1.0$
Age 45–59: $l_{x}=0.4, m_{x}=0.5$
Age 60+: $l_{x}=0.2, m_{x}=0.1$
Question 3
Using the logistic growth model $N(t)=\frac{K}{1+Ae^{-rt}},$ where $A=\frac{K-N_{0}}{N_{0}},$ estimate the time $t$ (in years) for a population to reach 75\% of carrying capacity given $N_{0}=10{,}000$, $K=1{,}000{,}000$, and $r=0.2$.
Question 4
An age structure diagram with a constrictive shape (narrower base than middle) indicates which population trend?
Question 5
Which factor most directly contributed to fertility decline during Stage 3 of the Demographic Transition Model?