Abehavior becomes a habit when it has been repeated. a.. 12 times. c.. 21 times. b.. 2 times. d.. 11 times.

Whether or not a given study has the possibility of causing harm to participants:

Which choice best describes the general trend for the countries shown, for the period 2008 - 2010?

Which statement is a good description of a model? a) models are a description of nature based only on one or two variables. b) models are testable ideas but they are not very to most people. c) models are a description of nature that predicts more accurately than real events. d) models are an approximiation of a real system that omits all but most essential variables in a system.