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Chapter 29 ReviewEchinoderms and
Invertebrate Chordates
Charles Page High School
Dr. Stephen L. Cotton
Chapter 29 ReviewEchinoderms
Which “class” of echinoderms most closely resembles the starfish “class”? Brittle stars
As the larvae of echinoderms become adults, their form changes from bilateral symmetry to radial symmetry.
Chapter 29 ReviewEchinoderms
The skeleton of an echinoderm is made up of plates
In echinoderms, the water vascular system is involved with what type of activities? Respiration, movement, internal transport, feeding, excretion
On which side of the starfish is the anus located? Aboral
Chapter 29 ReviewEchinoderms
Which of the following is not a part of the echinoderm’s water vascular system: madreporite; ring canal; radial canals; skin gills
Know the construction of the water vascular system of a starfish.
Chapter 29 ReviewEchinoderms
What are some members of the most ancient “class” of echinoderms? Sea lilies and feather stars
Does a starfish have any specialized systems? If so, what are they? digestive
What is the function of the statocysts? Balance and right side up
Chapter 29 ReviewEchinoderms
What are the echinoderms that resemble warty, moving pickles? Sea cucumber
Skeletal plates are reduced to tiny vestiges inside the soft, muscular body of a sea cucumber
What kind of symmetry do the larvae of starfish have? bilateral
Chapter 29 ReviewEchinoderms
Potential anti-cancer and anti-viral drugs are produced from chemicals extracted from starfish and sea cucumbers
Several years ago in a wide area of the Pacific Ocean, extensive damage was done to coral reefs by the sudden appearance of crown of thorns starfish
Chapter 29 ReviewEchinoderms
In many coastal areas, the distribution of algae is controlled by sea urchins
Which term is least closely related to the others: chordate; vertebrate; invertebrate; lancelet
Chapter 29 ReviewEchinoderms
Only during the early part of embryonic life do most chordates have a notocord
In aquatic chordates, such as lancelets and fishes, the pharyngeal slits became the gills
Chapter 29 ReviewEchinoderms
Unlike most chordates, lancelets lack backbones
A segmented nerve and muscle organization is found in all living ______.
Lancelets move by bending their bodies back and forth because they lack apendages
Chapter 29 ReviewEchinoderms
Some scientists believe that the true chordate characteristic is pharyngeal pouches
What does the similarity in structure between vertebrates and invertebrates indicate about their ancestors? Common ancestor
Chapter 29 ReviewEchinoderms
Know the examples we discussed concerning the members of each echinoderm “class”
All chordates display their distinguishing characteristics as _____.
Chapter 29 ReviewEchinoderms
Describe the skeleton of an echinoderm.
In some species of echinoderms, gas exchange occurs through which of the following: the anus; skin gills; radial canals; statocysts
Chapter 29 ReviewEchinoderms
Echinoderms, like many invertebrates, excrete nitrogen-containing wastes primarily in the form of ammonia
An adult starfish has radial symmetry.
Chapter 29 ReviewEchinoderms
Certain stages in the development of echinoderms are similar to stages in the development of some chordates
What do echinoderms use their tube feet for? Feeding, respiration, elimination and movement
Heart urchins and sand dollars live hidden in burrows in mud or sand
Chapter 29 ReviewEchinoderms
During the day, sea urchins wedge themselves in rock crevices
Most starfish move along the ocean bottom and prey on bivalves
The spines of some sea urchins are covered with sacs containing blue poisons.
Chapter 29 ReviewEchinoderms
Several years ago in the Pacific Ocean, extensive damage was done to Great Barrier Reef by crown-of-thorns starfish.
In many coastal areas, the sea urchins control the distribution of algae
Chapter 29 ReviewEchinoderms
The muscles of a lancelet are arranged in paired V-shaped units.
