Which of the following is an incorrect statement? a. gastrovascular cavities have a single opening through which animals both ingest food and expel wastes. b. extracellular digestion is the process in which food is broken down outside cells in a digestive system. c. intracellular digestion happens when animals digest food inside specialized cells that pass nutrients to other cells by diffusion. d. digestive tracts have 2 openings, which allows food to move in 2 directions.

The incorrect statement is option D. Digestive tracts have two openings, which allows food to move in two directions.

Explanation:

The digestive system is a long twisted tube from the mouth to the anus with a series of accessory organs connected to it. This long twisted continuous tube having two openings, mouth and the anus, called the digestive tract that allows food to move in one direction only (mouth to anus).

In the digestive tract, food enters from the mouth and food passing through pharynx, esophagus, stomach, small intestine, and large intestine. The indigestible food or waste eliminated through the anus.

So, the digestive tract allows food to move in one direction only.

Thus, incorrect option would be option D.

surface modification is a versatile tool and has been widely used in material science and engineering that has significantly facilitated the study and characterization of complex materials. at  matexcel, experienced experts in surface science can offer tailored efforts to meet the specific needs from our clients.

answer; convade;