Pertaining to absence of development or failure to develop normally?

• A. Aortogram
• B. Aphasia
• C. Apnea
• D. Aplastic

Answer: (D)

The idea here is how medical terms express lack of development. The prefix a- means without, and the root idea of development is built with plas- or -plasia. When you combine them, aplastic describes something that has not developed or has failed to develop normally. That makes it the best match for “pertaining to absence of development or failure to develop normally.”

Other terms refer to unrelated concepts: an aortogram is an imaging study of the aorta, aphasia is a language impairment, and apnea is the absence of breathing.