Which characteristic describes the digestive system of the bird but not the cnidarian?

A. Food particles are absorbed into the body by diffusion.
B. The digestive cavity carries both food and wastes.
C. Materials travel in one direction only through the digestive cavity.
D. Specialized cells and tissues aid in digestion.

what are the choices?

the potatoes have high sugar concentrations and although these potatoes were different we could seethe effects that their sugar concentrations had in different environments. for example, the potatoes in sample a, were placed in pure water. this created a hypertonic environment and caused the potatoes to draw in water from its surroundings. we saw the opposite happen with the potatoes in sample b when placed in the sodium chloride solution. the potatoes in this case were in a hypotonic solution and therefore lost water to their surroundings.