Environmental barriers to physical activity include both external/physical factors and social factors that may make it harder or easier for you to exercise.
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they have a high ration of surface area to volume and therefore readily lost heart
Answer:
conditioned stimulus; conditioned response
Explanation:
In respondent conditioning, also known as classical conditioning, a natural potent stimulus (food) that elicits a response naturally is paired with a neutral stimulus (bell), which initially would not produce any response but only attract attention. Learning or new behavior is elicited in this way.
The previously neutral stimulus which now elicits salivation is referred to as conditioned stimulus, while the salivation is called the conditioned response.
Answer:
Paramecium never gets old because it keeps on dividing into new paramecium by reproduction.
