Answer:
A. hairs on the back stand up when scared
Explanation:
B and C are not responses to stimuli, and D is a response to internal stimuli
Umbilicus or umbilical cord and im not sure about the name of the process!
Answer:
both types of cells have a cell membrane
The Earth Is billions of years old and Earth is much more different now than it was then.
When receiving x rays, individuals wear a lead<span>shield over major organs in order to limit the
body’s exposure to radiation. One reason for this
procedure is to </span><span>prevent mutations in gametes</span>