Answer:
Peristalsis moves food through the digestive system with alternating waves of muscle contraction and relaxation. Digestion includes both mechanical and chemical processes. Mechanical digestion is a purely physical process that does not change the chemical nature of the food.
So we can maintain homeostasis. Cell membranes help us sweat to cool us off.
The answer bilaterally symmetrical. Bilateral symmetry means that an object is equally divided in half along its central axis.
Answer:
They are identical copies of one type of antibody that are made by identical cells.
Photosystem II is the first step of photosynthesis, where the chlorophyll molecule uses light energy to take an electron from a water molecule.
