Unlike cnidarians and platyhelminths, round worms have a(n) A. one-way digestive tract. B. single-opening digestive tract. C. reproductive structures. D. bilaterally symmetrical body plan.

Respuesta :

Unlike cnidarians and platyhelminths, round worms have an one-way digestive tract. 
The answer is A the platyhelminths has a one way digestive tract