The most important reason for the massive increase in the human population over the past 200 years is
a. the Green Revolution that increased agricultural productivity.
b. the increase in the birth rate.
c. technology that has made it possible for humans to live in more places.
d. the decline in the death rate.
Question 2
Population growth was slow for most of human history because
a. death rates were very high.
b. abortion rates were very high.
c. people preferred small families.
d. low levels of technology always lead to low rates of growth.
Human Biology
Before the advent of vaccinations and antibiotics, infectious diseases such as cholera were the scou
Organization of the Food and Drug Administration showing the seven centers that regulate human and ...
Systems and Organs of the Human Body
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Structural comparison of human blood vessels and the direction of blood flow through them