Weather is associated with the layer of the atmosphere.

Which of the following is an example of negative reinforcement? a.marty knocks over his mother's prize fern so she gives him a time out. b.gwen mows the lawn and her dad takes her out for ice cream. c.tara takes an aspirin, and her headache begins to go away. d. peter comes in late from his lunch and is fired from his job.

Which organisims can cause diseases a. micro organisims b. multicellular organisnims c. both d. neither

Which allows college students to work part time jobs to pay for educational expenses ?