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Exam II Bio II

Echinoderms

QuestionAnswer
Key features of echinoderms and chordates Deuterostomes (mouth second), radial cleavage, true but reduces coelemates
Key features of echinoderms Slow, sessile, marine, slow predators, water vascular system, external fertilization, radial adult isnt exactly radial
What is the water vascular system of echinoderms? The hydrolic extention and tube feet used for movement, feeding, and breathing
Key features of sea stars Tube feet, vicious predators, eat sea urchins
Key features of brittle stars Lack tube feet and thrash for movement
Key features of sea urchins and sand dollars no arms, same structure (tube feet), spines controlled by muscles, eat plant matterK
Key features of sea lilies, feather stars, and crinoids They are stalked, suspension feed, and have an ancient lineage
Key features of sea cucumbers They have a slug cucumber shape and have tube feet near the mouth
Key features of chordates They have notochords originally used for support between the digestive tube and nerve chord, the notochord is reduced in many modern vertebrates (disks), have a dorsal hollow nerve chord, pharyngeal gill slits, and have a muscular post-anal tail (reduced)
What are two defining characters of Arthropods? Exoskeletons, jointed limbs
What kind of muscles do Nematodes have? longitudinal
What are two defining characters of Annelids? segmented, true coelem
What are two defining characters of Molluscs? Muscular foot, radula teeth, mantles, most have shell, cephalization (except bivalves)
Created by: MichaelaMH
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