Which of the following best describes the transfer of phosphates and the impact on the environment and human health? Phosphates decrease the growth of algae in surface water bodies, and an overpopulation of fish in surface water bodies occurs. Detergents containing phosphates are carried from land to water by rain, contaminating drinking water and causing digestive problems in humans. Leaky septic tanks transfer phosphates into the groundwater and are converted into nitrites in the human body, which are poisonous and could be fatal for infants. Nitrates increase the amount of organic substances in water and lowers the amount of dissolved oxygen, killing fish.

Microorganisms are involved in each of the following processes excepta. smog production.b. food production.c. infection.d. o2 production.e. decomposition of organic material.

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?

Which description provides the best objective summary of the article in the passage?