Which of the following is not an example of an ecological service provided by forests?

select one:

a. livestock grazing areas
b. reduction of soil erosion
c. purification of water and air
d. reduce atmospheric carbon

The ocean layer of a rapid temperature change with deph is known as the

When analyzing tree rings, what do scientists assume a thin ring indicates?

Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?