Question

The primitive multicellular animals having cellular level of organization are
a. Crustacean
b. Sponges
c. Ctenophores
d. Corals​

Answer 1

Answer:

b) The primitive multicellular animals having cellular level of organization are Sponges .

Explanation:

• Sponges are the most basic multicellular organisms, distinguished by their primitive cellular structure, porous bodies, and filter-feeding system. Sponges are made up of specialised cells that can perform a variety of tasks within the body.
• Sponges are the most primordial multicellular creatures, belonging to the class Porifera. These creatures have only cellular levels of body organisation and are thus the simplest metazoans.