When you swallow food, it doesn't just drop down into your stomach. Muscles contract in a wave-like motion to move the food along through the esophagus. This muscle movement is called, peristalsis, or peristaltic waves. These peristaltic waves contract behind the food bolus pushing it along the digestive tract.
Answer: It is important that cells have a "control system" because without it cells would either divide too fast or cause tumors to grow (cancer), or divide too slow and not be able to perform their cellular functions which is why the cells are controlled.
Answer:
Yes, we are born, reproduce, then die. Everything has that life cycle
Explanation:
Shrubs and trees regrow quickly in an area that has been burned during a forest fire.
Algae,grasses, and other small plants grow on newly exposed rock over a long period of time.
False, a grill chromosome is a cell! LOL