The answer is a because it just is
Only the bases varies from one nucleotide to another.
Answer:
Plant Parts - Flowers
The female part is the pistil. The pistil usually is located in the center of the flower and is made up of three parts: the stigma, style, and ovary. The stigma is the sticky knob at the top of the pistil. It is attached to the long, tubelike structure called the style.
