According to 2007 Census data, African Americans comprise about 12.3 of the U.S. population. Which of the following statements is true?
a. This is the largest proportion in our history.
b. The proportion of African Americans has remained almost the same from the late 1700's to the present.
c. This is smaller than the proportion of African Americans prior to the Civil War.
d. Since slaves were not counted in the census, we do not know how many African Americans lived in the U.S. before the Civil War.
Question 2
Which of the following is/are true about Puritan New England?
a. Statutes in Connecticut, Massachusetts, and New Hampshire called for the death penalty for children who cursed or struck their fathers.
b. Women who did not obey their husbands were subject to fines and whippings.
c. Both A and B above.
d. None of the above.
The cladistic approach from molecular genetic data
Body size and population density of herbivorous mammals
Nitrogen fluxes in Sycamore Creek, Arizona (data from Grimm 1988).
Zonal wind speeds on Uranus. Shaded areas show the southern collar and its future northern counterpa
Population Density
The level of future emissions is closely linked to the rate of population growth