Select from the frequently asked questions below
- Sponges are aquatic invertebrates that make up the phylum Porifera.
- Sponges are filter feeders.
- They pump water into their body through their pores.
- Sponges have an endoskeleton that gives them support and protection.
- They also have specialized cells.
What evidence do scientists point to when they say sponges may be the oldest type of animal on the planet?