Chelicerates all have 8 walking legs.

Sponges are multicellular filter-feeders that have __________ organs?

Deuterostomes first opening becomes the anus.

The extracellular matrix of kingdom animalia contains collagen and peptidoglycans.

Ecdysozoans include which of the following clades?

Diploblastic development contains which cell layers?

Which is not a characteristic of mammals?

What differentiates protostomes from deuterostomes?

Harvestman have venom and make webs.

Nematocytes are specialized organelles found on tentacles where they eject stinging thread to obtain food or defend themselves against predators. The phylum with these specialized organelles are?