(04.05 MC) Which of the following best describes a benefit of one type of nonrenewable energy? (2 points) Select one: a. Natural gas does not produce greenhouse gases when it is burned. b. Coal deposits are found on nearly every continent and mining coal poses few risks. c. Petroleum is not carbon based and will not produce carbon dioxide as a byproduct. d. Nuclear power does not produce air pollution as other energy sources do.

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?

What is usually (but not always) related to the metabolic processes of living organisms in its organic form?

Even though the ostrich is a flightless bird, ostriches still possess wings that stretch approximately two meters across when fully extended. scientists speculate that when dinosaurs became extinct, some of the birds that lived during that time became land dwellers since they were able to consume the food that the dinosaurs once ate. over time, these species grew larger and heavier. eventually, the ostrich species became too big to fly. the wings found on ostriches are known as a. analogous structures. b. homologous structures. c. vestigial structures. d. symmetrical structures.