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13 Cards in this Set
- Front
- Back
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Which of the following is a characteristic of adult echinoderms?
a. secondary radial symmetry b. spiral cleavage c. gastrovascular cavity d. exoskeleton e. lophophore |
a. secondary radial symmetry
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Which of the following can have long, movable spines?
a. class Crinoidea (sea lilies and feather stars) b. class Asteroidea (sea stars) c. class Ophiuroidea (brittle stars) d. class Echinoidea (sea urchins and sand dollars) e. class Holothuroidea (sea cucumbers) |
d. class Echinoidea (sea urchins and sand dollars)
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Deuterostomes that have an endoskeleton are part of which phylum?
a. Cnidaria b. Annelida c. Mollusca d. Arthropoda e. Echinodermata |
e. Echinodermata
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The water vascular system of echinoderms
a. functions as a circulatory system that distributes nutrients to body cells. b. functions in locomotion, feeding, and gas exchange. c. is bilateral in organization, even though the adult animal is not bilaterally symmetrical. d. moves water through the animal's body during suspension feeding. e. is analogous to the gastrovascular cavity of flatworms. |
b. functions in locomotion, feeding, and gas exchange
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What interesting thing happens when you cut off the arm of a sea star?
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in grows another one
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Which of the following is a shared characteristic of all chordates?
a. scales b. jaws c. vertebrae d. dorsal, hollow nerve cord e. four-chambered heart |
d. dorsal, hollow nerve cord
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What is one characteristic that separates chordates from all other animals?
a. true coelom b. post-anal tail c. blastopore, which becomes the anus d. bilateral symmetry e. segmentation |
b. post-anal tail
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Chordate pharyngeal slits appear to have functioned first as
a. the digestive system's opening. b. suspension-feeding devices. c. components of the jaw. d. gill slits for respiration. e. portions of the inner ear. |
b. suspension feeding devices
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Which extant chordates are postulated to be most like the earliest chordates in appearance?
a. lancelets b. adult tunicates c. amphibians d. reptiles e. chondrichthyans |
a. lancelets
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In invertebrate chordates what purpose does the notochord serve?
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support
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The embryonic origin of the dorsal hollow nerve cord is
a. ectoderm b. endoderm c. mesoderm |
a. ectoderm
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In vertebrates the notochord becomes the vertebral column.
True/False |
False
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What has all the chordate characteristics?
a. sea squirt adult b. sea squirt larva |
b. sea squirt larva
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