|
Author Question: Each of the following groups of things has been divided according to a single basis of ... (Read 58 times) |
Did you know?
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
Did you know?
Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.
Did you know?
The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
Did you know?
Illicit drug use costs the United States approximately $181 billion every year.
Did you know?
People about to have surgery must tell their health care providers about all supplements they take.