Phylum of animal kingdom-exoskeleton
Which other phylum of animal kingdom present species with exoskeleton?
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Arthropods present exoskeleton made of the chitin. Echinoderms don’t have exoskeleton however they present the calcareous endoskeleton. Some chordates also have external carapace.
This model is a useful extension of the supportive model. The term collegial relates to a body of persons having a common purpose. This model, which embodies a team concept, first achieved widespread applications in research laboratories and similar work environments.
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