Frederick Griffith experimented with two strains of bacteria by injecting them into mice in various combinations. He found that when you mix dead bacteria with live, it's possible for the live strain to acquire some of the traits of the dead one. Why was this important

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 goes in and out of a cell respiration?

What is any method of measuring the age of an object or event in years, such as using atomic half-life?