Examlex
There are only two main types of RNA needed to make proteins.They are tRNA and rRNA.
Aversive Stimulus
An unpleasant or noxious stimulus used to elicit a response or to condition a behavior through negative reinforcement or punishment.
Secondary Reinforcer
An acquired reinforcing stimulus, which becomes effective through its link with a primary reinforcer.
Positive Reinforcer
A prompting element, which upon being offered subsequent to an action, elevates the chances of the repetition of that action.
Stimulus
A stimulus is any object, event, or factor capable of inciting a physiological or psychological response.
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