Question

Cellular grade organisation is found in

• A. Helaminths
• B. Coelenterata
• C. Porifera
• D. All of the above

Answer 1

The correct option is C Porifera

Sponges (Porifera) have a cellular grade organisation. They do not possess any structures, that can be considered organs. The sponge cells of various types are responsible for bodily functions. They lack specialised organs and considered as the simplest phylum. Coelenterata has a tissue-grade organisation, while Helaminthes has an organ-grade organisation.

So, the correct answer is option C.