They help with metabolism and can act as enzymes or carriers and hormones. Protein has amino acids within it
Answer: I would go with B. Here’s why: An index fossil is usually easily recognizable, and underwent a wide geographic distribution. What leads me to believe B is the correct answer, is because it’s something that existed “ all over the world”.
“Cells grow weaker in time, and get more prone to the mutation.”
ATP is the cell's energy, the mitochondria (aka the power house of the cell) is what produces ATP. The process is called Cellular Respiration.
