BISC120_FinalExam_Fall05_page6 - Name TA 32 The arthropods...

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Unformatted text preview: Name TA 32. The arthropods superficially resemble earthworms in that both groups . yet the two are distinctly different because arthropods. but not earthworms. . A) have prominently segmented bodies have jointed appendages B) have closed circulatory systems have bristles C) are cephalized and bilaterally symmetrical have true organs D) have a true coelom are protostomes E) are acoelomates are sogrnented 33. The water vascular system of a sea star functions in A) movement of the tube feet. B) digestion C) pumping water for swimming movements. D) excretion. E) keeping all parts of the body moist at low tide. 34. Which one of the following statements about the phylum Echinoderrnata is false? A) Echinoderms have true radial symmetry as adults. B) Larval forms show evidence of bilateral symmetry, which is mostly lost in the adult form. C) One of the classes in this phylum is Asteroidea - the sea stars. D) Some have both a mouth and anus. while some have-only a mouth. E) Many species possess an internal calcareous skeleton and spiny dermal projections. 35. Which of the following is not a shared characteristic of all chordates? A) pharyngeal cletts B) post—anal tail C) notochord D) dorsal. hollow nerve cord E) four-chambered heart 36. Which of the following statements would be least acceptable to most zoologists? A) The extent oephaloehordates are contemporaries, not ancestors. of vertebrates. B) The first fossils resembling cephalochordates appeared in the fossil record around 550 million years ago. D) Recent work in molecular systematics supports the hypothesis that cephaiochordates are the most recent common ancestor of all vertebrates. D) The extent cephalochordates are the immediate ancestors of the fishes. E) Cephalochordates display the same method of swimming as do fishes. 37. The bony fishes are characterized by A) a bony endoskeleton. opercutum. and usually a swim bladder. B) a cartilaginous endoskeleton. C) an amniotic egg. D) teeth that are replaced regularly. E) a lateral line system and ears with three semicircular canals. 38. Which of the following classifications do not apply to both dogs and humans? A) class Mammalia B) order Primates C) phylum Chordata D) kingdom Animalia E) subphylum Vertebrate Total nnints. this name ...
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