Which was charles darwin’s contribution to the study of biology?
a.) he was the first person to recognize that organisms change over time.
b.) he believed that organisms adapted through the inheritance of acquired traits.
c.) he explained how traits are passed from parents to offspring.
d.) he proposed that natural selection is the primary mechanism of evolution.

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?

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

Witch theory suggests all living things are made up of cell or cells