Name
Date
Echinoderms and Invertebrate Chordates
Section 2 Invertebrate Chordates
Details
Main Idea
Scan the illustrations and read the captions in Section 2. Write two
facts you discovered about invertebrate chordates.
1.
2.
Review
Vocabulary
Use your book or dictionary to define deuterostome.
deuterostome
New
Vocabulary
Use your book or dictionary to define each term.
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
chordate
invertebrate chordate
notochord
postanal tail
dorsal tubular nerve
cord
pharyngeal pouch
Echinoderms and Invertebrate Chordates
283
Name
Date
Section 2 Invertebrate Chordates
Main Idea
Invertebrate
Chordate
Features
I found this information
.
on page
(continued)
Details
Identify the four distinctive features of chordates and their location
on the animal. Describe how each feature benefits the animal.
Feature
notochord
Location
Benefits
can propel an animal with
more powerful movements
than the body structure
of invertebrates without a
postanal tail
Analyze the importance of an endostyle.
Diversity of
Invertebrate
Chordates
I found this information
.
on page
Describe the following features of lancelets.
Phylum:
Skin:
Feeding method:
Movement:
Sensory structures:
Blood circulation:
284
Echinoderms and Invertebrate Chordates
Subphylum:
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
above the digestive
organs
Name
Date
Section 2 Invertebrate Chordates
Main Idea
I found this information
.
on page
(continued)
Details
Model a tunicate. Label its parts. Identify its subphylum.
Subphylum:
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
Analyze why tunicates are called sea squirts.
Evolution of
Echinoderms
and Invertebrate
Chordates
I found this information
.
on page
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 and 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,
allowing a swimming motion.
S UMM ARIZE
Why do lancelets excite the scientific community?
Echinoderms and Invertebrate Chordates
285
Name
Date
Tie It Together
S YNTHESIZE
Sea Star:
Brittle Star:
•
•
•
•
Sea Urchin:
Sand Dollar:
•
•
•
•
Sea Lily:
Feather Star:
•
•
•
•
Sea Cucumber:
Lancelet:
•
•
•
•
Tunicate:
•
•
286
Echinoderms and Invertebrate Chordates
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
You plan to visit a large aquarium. You want to be able
to identify specific echinoderms and invertebrate chordates among the many sea creatures on
display. Create an identification guide by listing two observable features that distinguish each
animal below. Features can be physical or behavioral.