If you examined a biology class chart from the first half of the last century,the echinoderm sheet would be found immediately following the cnidarian sheet,a very primitive location in the survey of the phyla.Today we discuss echinoderms as one of the last invertebrate groups before studying chordates.Describe why we have changed our perspective on the evolutionary placement of echinoderms.

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The Answer of If you examined a biology class chart from the first half of the last century,the echinoderm sheet would be found immediately following the cnidarian sheet,a very primitive location in the survey of the phyla.Today we discuss echinoderms as one of the last invertebrate groups before studying chordates.Describe why we have changed our perspective on the evolutionary placement of echinoderms.

If You Examined a Biology Class Chart from the First