Survival is based on the availability of food and resources. which of the following would be the most likely means for nomadic tribes to obtain food?
(a) farming land plots
(b) migrating animals
(c) navigating via canals
(d) using steam engine machines

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.