Why are spicules used as a primary characteristic in taxonomy of sponges?

Answer

Spicule shapes and mesh structures are essentially the only variable amongst sponge morphology that can be easily differentiated. Sponges are often described as evolutionary dead ends because there is so little variation possible (comparatively) with
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Ask.com Answer for: Why Are Spicules Used as a Primary Characteristic in the Taxonomy of Sponges
Phylum Porifera
Sponges are a diverse group of sometimes common types, with about 5000 species known across the world. Sponges are primarily marine, but around 150 species live in fresh water. Sponges have cellular-level organization, meaning that that their cells... More >>
Other Phyla:
Q&A Related to "Why are spicules used as a primary characteristic..."
see the Pearson's chi square test.
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