Answer:
The answer is:
E. They lack a plasma membrane.
The reason is that the plasma membrane is actually a very important part of their cell. Hope that helps! :)
Answer:
by respiring and by passing urine
Explanation:
The inner layer of the stomach is full of wrinkles known as rugae (or gastric folds). Rugae both allow the stomach to stretch in order to accommodate large meals and help to grip and move food during digestion.
Answer:
Once you begin swallowing, the process becomes automatic. Your brain signals the muscles of the esophagus and peristalsis begins. Lower esophageal sphincter. When food reaches the end of your esophagus, a ringlike muscle—called the lower esophageal sphincter —relaxes and lets food pass into your stomach.
