What is a reason for migration? changes in the lifecycle

seasonal change

predators recently moving into a area

changes in food levels

In the mid 1800s western settlers and american indians differed in their views about

Steven pinker states that an important difference exists between men and women in:

Before they can be published, scientific papers must be peer-reviewed. this means that: a) some other scientific experts read the papers and guarantee that they are true.b) some other scientific experts read the papers and provide quality control by eliminating many mistakes.c) an editor reads the papers, to make sure that all the semicolons are in the correct places.d) everyone in the world is given the opportunity to comment on the papers through a specially maintainedblog.e) government bureaucrats read the papers, to be sure that the papers do not insult the political positions ofthe current officeholders.