Select the correct answer. What does the equation NPP = GPP − R represent? A. It represents the amount of chemical energy that will be available to consumers. B. It represents the amount of chemical energy that will not be available to consumers. C. It represents the amount of solar energy that will be available to consumers. Reset Next Ecosystem Productivity: Mastery Test © 2020 Edmentum. All rights reserved.

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?