Question

Organisms belonging to phylum__________have a body with loosely arranged cells with minimal differentiation.

• A. Coelenterata
• B. Protozoa
• C. Porifera
• D. Echinodermata

Answer 1

The correct option is C Porifera

Phylum Porifera includes organisms that do not have a well-defined tissue structure. The body consists of loosely attached cells held to a solid support at the bottom of the sea. The body is porous and cells show very little differentiation. Example: sponges.

Coelenterata or Cnidaria are radially symmetrical diploblastic animals. Protozoa are unicellular eukaryotes. Echinoderms are radially symmetric animals with awell defined tissue strcture.