Fact 1: Adult sponges are sessile.

Fact 2: Polyps can be peduncular or sessile, and are usually viral in origin.

Given the two facts above, answer the question "What does an adult sponge have?" with the following options: 
- gills
 - Length
 - polyps
 - Energy.
 - alveoli
 - a cuticle
 - retina
 - Energy


 

   polyps      