69. Sponges and Porifera

Match it! Select the correct answer from the pull down...Good luck!

There are ____ classes of sponges.

A sponge filters water through its body and gains nutrients from tiny organisms in the water.

Calcarea sponges use calcium to make their skeletons.

There are more than 20,000 species of spongers.

Glass sponges use ________ dioxide to make their skeletons.

Spongers is a special protein used to make a sponges ______

Sponges have a nervous system.

Sponges have large mouths and very small brains.