Which of the following best illustrates human childbirth?
a. Human infants today are much less likely to die during childbirth because the birth canal is significantly larger than it was 200,000 years ago.
b. Human infants are much more susceptible to death during childbirth now that human heads are comparatively larger.
c. Biological evolution is completely dependent on cultural practices.
d. Cultural beliefs and practices mark every aspect of birth.
Question 2
By 1,550 years ago, the population of Tikal had achieved a density of _____ people per square kilometer.
a. 600 to 700
b. 25 to 100
c. 1 million
d. 100 to 150
e. 3,000 to 5,000