He thought that only one giant piece of land was called Pangea. The answer is A.
Answer:
The concentration effect occurs because DDT is metabolized and excreted much more slowly than the nutrients that are passed from one trophic level to the next. ... spraying a marsh to control mosquitoes will cause trace amounts of DDT to accumulate in the cells of microscopic aquatic organisms, the plankton, in the marsh.
Explanation:
A is the correct answer, I believe. There are not usually enough doners as there are people who need the organs, so doing this COULD help (though it's gross)
~Hope this helps!
During the second trimester, energy needs of pregnant women are 340 more kcalories per day than those of nonpregnant women.
