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zloy xaker [14]
3 years ago
12

What makes echinoderms unique to all other animals? (think of systems/structures they

Biology
1 answer:
Sever21 [200]3 years ago
7 0
Although these spines may look like components of an exoskeleton at first glance, echinoderms do not have an exoskeleton. This is partly due to their symmetry and their spiny endoskeleton.
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