Science Notebook - Student Edition

(Steven Felgate) #1

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Echinoderms and Invertebrate Chordates 285

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on page.

Evolution of
Echinoderms
and Invertebrate
Chordates
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on page.

Model a tunicate. Label its parts. Identify its subphylum.

Subphylum:

Analyze why tunicates are called sea squirts.

Identify key developments in the evolution of echinoderms and
invertebrate chordates by completing the following paragraph.
Probably echinoderms evolved from ancestors with
symmetry because echinoderms have this kind of symmetry in the
stage. Echinoderms develop
symmetry in the adult stage. development
links echinoderms to chordates. The key features of
shared by lancelets and tunicates show their close relationship,
though have these features only as larvae. A key
development in the evolution of chordates was the ,
which provided support and a place for to attach,
leading to the first large animals.

Section 27.2 Invertebrate Chordates (continued)

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Why do lancelets excite the scientific community?

(^) SUMMARIZE

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