A statistical measure of the relationship between two variables is known as

The human population doubled from 1 to 2 billion between 1800 and 1930. What led to this increase in population?

a. government-controlled farming b. globalization and shared resources c. medical advances that eliminated many diseases d. people had more children

Regarding teratogens and birth defects, which of the following statements is FALSE?

a. Radiation, lead, and pesticides are considered teratogens. b. Cystic fibrosis, PKU, and hemophilia are considered teratogens. c. Pregnant women do have direct control over many teratogens. d. Repeated heavy drinking during pregnancy is the most common cause of birth defects in the United States.