Answer:
- Sponges
- Sponges are the only multicellular animals that have no nervous system.
2. Cnidarians
- Cnidarians contain specialized cells known as cnidocytes (“stinging cells”), which contain organelles called nematocysts (stingers). These cells are present around the mouth and tentacles.
3. Cells
- Cells are the building blocks of life – all living organisms are made up of them.
All my answers are based on G.
Hope this helps. ;)
Goodluck.