The dead zone in the Gulf of Mexico is primarily the result of
A) nonpoint sources of pollutants.
B) point sources of pollutants.
C) a natural cycle related to cold ocean currents.
D) industrial pollution by oil refineries in the New Orleans region.
Question 2
Small subsistence farms in developing nations
A) had a sustainable use of the environment when populations were smaller than now.
B) have mostly depleted the natural environment, making farming no longer possible.
C) can support the developing populations at up to 10 times their current population size.
D) have polluted rivers and streams and destroyed surrounding forests.
Nitrogen content of live and dead leaves
In the summer of 1793, a yellow fever epidemic struck Philadelphia, killing nearly 4,000. Tens of th
Sources of Trans Fat in the Diet
Gulf Stream/North Atlantic Current
Cretinism can result in a child born to a mother who was iodine deficient during early pregnancy
Common restriction enzymes, with their recognition sequence, DNA cutting patterns, and sources