Which of the following is an incorrect statement? A. Digestive tracts have 2 openings, which allows food to move in 2 directions.
B. Gastrovascular cavities have a single opening through which animals both ingest food and expel wastes.
C. Extracellular digestion is the process in which food is broken down outside cells in a digestive system.
D. Intracellular digestion happens when animals digest food inside specialized cells that pass nutrients to other cells by diffusion.