An internal skeleton is used to help an organism hold its body up and keep from falling, while a stem stores nutrients, and produces new living tissue, and transports fluids.
pancreas
Explanation:
In addition to the GI tract, there are digestion accessory organs (salivary glands, pancreas, gallbladder, and liver) that play an integral role in digestion. The accessory organs do not come directly in contact with food or digestive content.
Photosynthesis is The prosses of turning light energy into Chemical energy
accrues in plants and some algae
It's A. Temperature changes modify the enzyme shape, so they no longer fits.
