Which of these best describes the concept of the rock cycle?
a) sedimentary rocks may be remelted several times
b) rocks move in circles on the earth as the earth rotates
c) rocks can be moved from place to place on the earth without changing
d) rocks are continually changing, and any type of rock may be
transformed into another type by appropriate processes

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 of the following words best matches this definition: the process in which the best adapted organisms survive and pass on their traits, while those that are not well adapted do not survive to pass on their traits. question 3 options: acquired selection natural selection artificial selection organic selection

Which measure of an earthquake depends on how close you are to the focus?