Biology, 02.08.2019 02:20 caitybugking
Which animal phylum is characterized by a lack of symmetry (asymmetrical), and a "skeleton" composed of spicules and sometimes a protein called spongin?
a) cnidaria.
b) annelida.
c) chordata
d) porifera.
e) mollusca
Answers: 1
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Which animal phylum is characterized by a lack of symmetry (asymmetrical), and a "skeleton" composed...
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