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Bio II Chap 27 Rvw

Biology II Chapter 27 Review

QuestionAnswer
List characteristics of a sea star. 5 armed, tube feet used for feeding and movement.
List characteristics of a brittle star. 5 armed, arms break off easily and can be regenerated, tube feet have no suction cups.
List characteristics of sea urchins and sand dollars. Body encased in a test with spines, sea urchins burrow in rocky areas, sand dollars burrow in sand.
List characteristics of sea lilies and feather stars. Sessile for some part of life, sea lilies have long stalks, feather stars have long branching arms.
List characteristics of sea cucumbers. Cucumber shape, leathery outer body, tube feet modified to tentacles near mouth.
List characteristics of sea daisies. Less than 1 cm in diameter, no arms, tube feet located around central disk.
What is the phylum name for echinoderms, give 2 examples of animals that belong to this kingdom. Echinodermata; sea urchins and sand dollars.
What is the endoskeleton in an echinoderm made of? What is it covered with? Calcium carbonate plates; thin layer of skin.
What type of symmetry do echinoderms have during their life cycle? Bilateral symmetry (when in larval stage) and radial symmetry (when adults).
Name 3 functions of tube feet found in some echinoderms. 1. Movement 2. Food collection 3. Respiration
What unique act do some echinoderms perform when feeding? They push their stomach out of their mouth to consume their food.
How do most echinoderms carry out respiration, circulation, and excretion? Diffusion through the thin body membranes of the tube feet.
Saying "invertebrate chordate" is an oxymoron. Why? A chordate is an animal that (most likely) contains a backbone, such as humans, but an invertebrate is an animal with no backbone.
What are four distinguishing features of an invertebrate chordate? 1. Dorsal tubular nerve cord 2. Notochord 3. Pharyngeal pouches 4. Postanal tail
Compare and contrast a lancet and a tunicate. Lancets burrow into sand, are filterfeeders, do not move a lot, nervous system of branching nerves & a simple brain. Tunicates are sessile, only show chordate features in larval stages, trap food in a mucous net and move into stomach, heart/blood vessels
Created by: itscourtneym
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