How are the majority leaders, minority leaders, Speaker of the House, and President Pro-Tempore chosen?

the year 2019 marks the 2115th anniversary of his birth.

there was a king, priests, and peasants.

in classical conditioning the organism learns to associate new stimuli with natural, biological responses such as salivation or fear. the organism does not learn something new but rather begins to perform in an existing behavior in the presence of a new signal. operant conditioning, on the other hand, is learning that occurs based on the consequences of behavior and can involve the learning of new actions.