It is known as stimulus or the plural form stimuli. It can be external or internal.
Answer:
A contraction is when the muscles of your uterus tighten up like a fist and then relax. Contractions help push your baby out. simple as that
Explanation:
Organisms need to take food because you need it to survive.
Autotroph --
<span>Autotroph is </span>an organism that can form nutritional organic substances.
Answer:
The smooth ER is responsible for assembling and packaging lipids
The epiglottis is a flap over your windpipe that protects food from getting in and choking you.