D. having trouble relaxing
While all of the above ingredients are in a cigarette, nicotine is the stimulant that causes addiction and dependency.
The umbilical cord will stop pulsating approximately 3-5 minutes after birth.
I am about 100 percent sure its D
The correct answer is enzyme linked receptor. It is also known as a catalytic receptor and <span>is a transmembrane <span>receptor.</span></span>
