Final answer:
FoxO in Hydra regulates reproduction, digestion, and body size, apart from stem cell maintenance.
Step-by-step explanation:
FoxO regulates multiple processes in Hydra apart from stem cell maintenance. One of those processes is reproduction. FoxO has been found to play a role in regulating the growth and development of reproductive structures in Hydra.
Another process regulated by FoxO in Hydra is digestion. FoxO has been shown to influence the expression of genes involved in nutrient uptake and digestion in Hydra.
Additionally, FoxO has been implicated in regulating body size in Hydra. Studies have shown that manipulating FoxO activity can lead to changes in body size in Hydra.
Therefore, apart from stem cell maintenance, FoxO regulates reproduction, digestion, and body size in Hydra.