The correct answer is B. Pinna because auris externa is the external portion of the ear, which is called auricle ( also known as pinna ).
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it can be further divided into epoch
It might change over time to compensate fir its environment
I believe that the concept of reaction range proposes that genetics establishes boundaries, whereas environment determines where a person falls within that range. Range of reaction is a concept in psychology, genetics, and related fields that the expressed characteristics or traits of an organism depend on both the genetic characteristics and the environment.