Concept explainers
To write: The features that this animal share with invertebrate chordates
Introduction: Chordates are species belonging to the phylum Chordata that at some stage during their development have four distinctive characteristics-a dorsal tubular nerve cord, pharyngeal pouches, a notochord and a postanal tail.
Explanation of Solution
Chordates and invertebrate chordates possess dorsal tubular nerve cord, a notochord, postanal tail, pharyngeal pouches, and, possibly, an ancestral thyroid gland. The notochord is dominated by bone or cartilage in most vertebrates. The notochord persists in invertebrate chordates. Postanal tail reaches past the anus, in most chordates. Nonchordates tails have portions of the
Chapter 27 Solutions
Biology Illinois Edition (Glencoe Science)
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