Among the groups of elements listed below, which have the same number of electrons in their highest occupied energy levels?

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 term defines a power shared by state and federal governments? concurrent expressed implied reserved

What is the function of the organelle labeled a in the diagram?