Biol 303 Exam 2

Biol 303 Exam 2 - Exam 2 Biology 303 Fall 2006 Birchard...

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Exam 2 Biology 303 Fall 2006 Birchard NAME:_____________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Which of the following is a characteristic of adult echinoderms? A) secondary radial symmetry B) spiral cleavage during early embryonic development C) gastrovascular cavity D) exoskeleton E) a lophophore 2) Their mouth is directed upward in this class of echinoderm. 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) 3) 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 has radial anatomy. D) moves water through the animal's body during suspension feeding. E) is analogous to the gastrovascular cavity of flatworms 4) Which of these are characteristics of all chordates during at least a portion of their development? A) a dorsal, hollow nerve cord B) pharyngeal clefts C) post-anal tail D) A and B only E) A, B, and C 5) 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 6) Which extant chordate group is postulated to be most like the earliest chordates in appearance? A) Cephalochordata B) adult Urochordata C) Amphibia D) Reptilia E) Chondrichthyes 7) Which are extinct organisms that may represent a transition between cephalochordates and vertebrates? A) Haikouella and Haikouichthys B) Archaeopteryx C) Acanthostega D) conodonts E) acanthodians 8) Lampreys differ from hagfishes in A) lacking jaws. B) having a cranium. C) having pharyngeal clefts that develop into pharyngeal slits. D) having a notochord throughout life. E) having a notochord that is surrounded by a tube of cartilage 9) To which of these are the scales of chondrichthyans most closely related in a structural sense? A) osteichthyan scales B) reptilian scales C) mammalian scales D) bird scales E) chondrichthyan teeth 10) Which group's members had (have) both lungs and gills during their adult lives? A) sharks, skates, and rays B) lungfishes C) cephalochordates D) paramphibians E) ichthyosaurs and plesiosaurs 11) Which are the most abundant and diverse of the extant vertebrates? A) bony fishes B) avian reptiles C) amphibians D) non-avian reptiles E) mammals 12) The swim bladder of bony fishes A) was probably modified from simple lungs of freshwater fishes. B) developed into lungs in saltwater fishes. C) first appeared in sharks. D) provides
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buoyancy, but at a high energy cost. E) both C and D 13) Arrange these taxonomic terms from most inclusive (i.e. most general) to least inclusive (i.e. most specific).
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Biol 303 Exam 2 - Exam 2 Biology 303 Fall 2006 Birchard...

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