Give the main features of chordates.
(N/A) All chordates possess the following fundamental features:
$(i)$ Presence of a notochord.
$(ii)$ Presence of a dorsal hollow nerve cord.
$(iii)$ Presence of paired pharyngeal gill slits.
$(iv)$ Presence of a post-anal tail.
$(v)$ They are triploblastic,bilaterally symmetrical,and coelomate animals.
$(i)$ Presence of a notochord.
$(ii)$ Presence of a dorsal hollow nerve cord.
$(iii)$ Presence of paired pharyngeal gill slits.
$(iv)$ Presence of a post-anal tail.
$(v)$ They are triploblastic,bilaterally symmetrical,and coelomate animals.
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