|
Author Question: Australopithecus afarensis lived from __________. a. 4.2 to 3.5 mya b. 5.1 to 4.5 mya c. 3.9 to ... (Read 89 times) |
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
It is difficult to obtain enough calcium without consuming milk or other dairy foods.
Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.
Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.
In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.