Plants have meristem cells that contain the DNA that decides how they take shape and function.
If a chemistry student is given a molecular formula of a molecule, she or he can easily and readily identify if it is compound by checking the bond either a covalent bond or ionic bond. Check the items of each element since elements in a compound are in fixed ratio, she or he can easily identify.
Digestion is of two types, mechanical and chemical. Food first enters the mouth where it is mechanically digested by the teeth and chemically digested by the enzymes in the saliva. Next, food travels to the pharynx and then the esophagus via peristaltic motion of the muscles. Then the food enters the stomach, where chemical digestion is completed. The broken down food is sent to the small intestine for absorption and then the large intestine to have water removed and then be expelled from the body.
The answer that would best complete the given statement above would be the second option: MUSCLES. Contractile proteins are found in muscles. <span>The muscles themselves contain muscle fibers, each of which contains cylindrical strands of </span>contractile proteins <span>called myofibrils. Hope this answers your question.</span>