Add or Subtract. Simplify the Answer

question 17

Multiple Choice

Add or subtract. Simplify the answer.
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Definitions:

DNA

Deoxyribonucleic acid, the hereditary material in humans and almost all other organisms that contains the instructions necessary for building and maintaining an organism.

Gene

Section of DNA having the same arrangement of chemical elements.

Amine

Organic compounds derived from ammonia by replacement of one or more hydrogen atoms by hydrocarbon or other radicals; they play essential roles in biology as building blocks of proteins and neurotransmitters.

Developmental Psychologist

A professional who studies the growth and development of the human mind and behavior across the lifespan.