Question

3) Give examples of moarphological evidene​

Answer 1

Answer:

Some morphological structures are found only in one phylum; for example, only the Coelenterata have stinging cells (nematocysts), the Echinodermata (invertebrates such as starfishes) have a peculiar water vascular system, and only the Chordates (e.g., reptiles, birds) have a dorsally located, hollow nerve cord.

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