Order Code: BM104DV    ISBN : 9781930527782
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Show that these diverse animals are unified by four characteristic structures: a hollow dorsal nerve chord, a supportive notochord, gill slits, and a post-anal tail. Evolutionary milestones (improvements in swimming and feeding, paired fins and a primitive lung, movement onto land, and the amniotic egg) are addressed. 18 minutes. ©2005.

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