Which of the following combinations of phylum and description is incorrect?
a. Cnidaria - radial symmetry, polyp and medusa body forms
b. Platyhelminthes - flatworms, gastrovascular cavity, acoelomate
c. Porifera - gastrovascular cavity, coelom present
d. Echinodermata - bilateral symmetry as a larva, coelom present
e. Nematoda - roundworms, pseudocoelomate

c. Porifera - gastrovascular cavity, coelom present

Explanation:

Porifera is a phyla of organisms that do not have coelom. They possess several pores and canals used to perform their biological functions and which allows the circulation of water through them.

They also posses two thin cell layers which are sandwiched together. The two layers are the outer layer (epidermis) and the inner layer (inner cavities).

Porifera do not possess gastrovascular cavity (digestive, circulatory or nervous systems). In other to obtain oxygen and food and to excrete wastes, they depend on the constant influx of water through the pores and canals in their body

Sponges are members of the porifera phylum