The crayfish usually molts or sheds its exoskeleton twice a year why does the crayfish hide

Articles of the confederation is a good representation of a system of government.

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.

Crops grew well in mesopotamia because a. the land was in mountainous areas. b. farmland was fertile and water was nearby. c. the area was near the ocean water supply. d. the area received adequate rainfall. select the best answer from the choices provided a b c d