Sponges have large mouths and very small brains.
Sponges can only grow in one spot.
Sponges feed on __________
There are more than 20,000 species of spongers.
A sponge filters water through its body and gains nutrients from tiny organisms in the water.
Sponges can not change the shape of their body.
Sponges have a nervous system.
There are ____ classes of sponges.
Spongers is a special protein used to make a sponges ______
Calcarea sponges use calcium to make their skeletons.
Glass sponges use ________ dioxide to make their skeletons.
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