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Digestion of food particles in a sponge takes place in its ___.
collar cells
Porifera
ganglia
medusa
round worm
coelum
97%
spongin
The body parts of some inveretebrates are contolled by indiviual groupings of nerve cells called ___.
collar cells
Porifera
ganglia
medusa
round worm
coelum
97%
spongin
The body parts of a jellyfish is the ___, which looks like a ball with tentacles hanging underneath.
collar cells
Porifera
ganglia
medusa
round worm
coelum
97%
spongin
Invertebrates make up what percentage of all animals?
collar cells
Porifera
ganglia
medusa
round worm
coelum
97%
spongin
Bath sponges have a skeleton made of a special protein called ___.
collar cells
Porifera
ganglia
medusa
round worm
coelum
97%
spongin
Trichinella spiralis, the worm that causes trichonosis, is a ___.
collar cells
Porifera
ganglia
medusa
round worm
coelum
97%
spongin
Sponges belong to the phylum ___.
collar cells
Porifera
ganglia
medusa
round worm
coelum
97%
spongin
The organs of more-comples invertebrates such as the earthworm contain in a body cavity called the ___.
collar cells
Porifera
ganglia
medusa
round worm
coelum
97%
spongin
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