3c Invertebrates Pt 4 – Flashcards

31) Which of the following can extend the stomach through their mouth to feed? 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)

32) Which of the following have distinct central disks and very long, flexible arms? 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)

33) Which of the following have a mouth that is directed upward? 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)

34) 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)

35) Which of the following describe(s) echinoderms? a. They have an endoskeleton of hard calcareous plates. b. Tube feet provide motility in most species. c. They have a pseudocoelom. d. Only A and B are true. e. A, B, and C are true.

36) Which of the following animal groups is entirely aquatic? a. Mollusca b. Crustacea c. Echinodermata d. Arthropoda e. Annelida

37) Protostomes that have an open circulatory system and an exoskeleton of chitin are part of which phylum? a. Cnidaria b. Annelida c. Mollusca d. Arthropoda e. Echinodermata

38) Which of the following is a diploblastic phylum of aquatic predators? a. Cnidaria b. Annelida c. Mollusca d. Arthropoda e. Echinodermata

39) Deuterostomes that have an endoskeleton are part of which phylum? a. Cnidaria b. Annelida c. Mollusca d. Arthropoda e. Echinodermata

40) Protostomes that have a closed circulatory system and obvious segmentation are part of which phylum? a. Cnidaria b. Annelida c. Mollusca d. Arthropoda e. Echinodermata

41) Which phylum is characterized by animals that have a segmented body? a. Cnidaria b. Platyhelminthes c. Silicea d. Arthropoda e. Mollusca

42) Which of the following characteristics is probably most responsible for the great diversification of insects on land? a. segmentation b. antennae c. eyes d. bilateral symmetry e. exoskeleton

43) 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.

44) Which of the following combinations of phylum and description is incorrect? a. Echinodermata? bilateral symmetry as a larva, coelom present b. Nematoda? roundworms, pseudocoelomate c. Cnidaria? radial symmetry, polyp and medusa body forms d. Platyhelminthes? flatworms, gastrovascular cavity, acoelomate e. Calcarea? gastrovascular cavity, coelom present