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What is the feeding structure used by the Class Echinoidea?
Aristotle's latern, over 50 ossicles and has 5 small teeth
Describe the feeding habits of Echinoidea
most sea urchins are herbivorous, sand dollars are deposit feeders
What are the four characteristic shared by all chordates?
dorsal hollow nerve cord, pharyngeal slits, notocord, post anal tail
What are the defining characteristics of vertebrates?
extreme cephalization, cranium, neural crest celss, vertebrae (in most), kidneys
Describe the lifestyle of Myxinoidea
hagfish: scavengers that live on the sea floor uses keratinized tooth like structures for feeding, slime glands
Describe the lifestyle of Petromyzontoidea
lampreys: closed relative to modern verts, external parasites of fish, larva are suspension feeders, oral suckers, rasping tongue
Name the two members of chordata without a well developed back bone
Petromyzontoidea (lampreys) and Myxinoidea (hagfish)
What makes up the appendicular skeleton?
pelvic and pectoral girdles and associated paired appendages
What is the sensory organ in fish that can feel vibrations, electrical fields, and molecular gradients in water.
yolky eggs develop within the reproductive tract of the mother until they hatch, but depend on nutrient stores within the eggs.
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