Nematodes lack which trait that is present in almost all bilaterians? a Non-ciliated epidermis and cuticel Ecydysis A nervous system Bilateral body symmetry Circular muscles Question 2 Nematodes and Tardigrades are both pseudocoelomates, which means that: Their coeloms form by "pinching" enterocoely They lack mesoderm The pseudocoelom can be used to transport food and waste around the body They have no excretory system They do not undergo gastrulation.