This figure shows the metabolism of glucose and oxygen to CO2 and H2O. From what molecule do the carbon in CO2 and the hydrogen in H2O come from? 
Definitions:
Parents
The caregivers of offspring in their own species; in humans, typically refers to a child's biological or adoptive mother and father.
Extinction
in psychology, refers to the gradual disappearance of a conditioned response when the conditioned stimulus is no longer paired with the unconditioned stimulus.
Resistance To Extinction
The persistence of learned behavior or response even after the original stimulus (e.g., reinforcement) is no longer present.
Spontaneous Recovery
The reappearance of a previously extinguished conditioned response after a period of time without exposure to the conditioned stimulus.
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