Bio 1720 Exam1

Bio 1720 Exam1 - Name:_ Signature:_ Exam I, BIOL 1720...

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Name:________________________________ SS#:_________________________ Signature:_____________________________ Exam I, BIOL 1720 Summer 2001 1. The term notochord refers to: a. a hollow nerve cord that runs just beneath the dorsal surface of a chordate. b. a flexible rod that forms along the dorsal side of the primitive gut of the embryonic forms of chordates. c. one of the pharyngeal slits which connects to the pharynx of embryonic forms of chordates. d. the central portion of the postanal tail that extends beyond the anus of embryonic forms of chordates. 2. Muscles which produce the same action at a joint are best described as: a. isotonic. b. isometric. c. synergistic (or synergists). d. antagonistic (or antagonists). e. cooperative. 3. The first vertebrates to walk on land were the: a. insects. b. fish. c. amphibians. d. reptiles. e. dinosaurs. 4. The dinosaurs replaced which group as the dominant land animals? a. amphibians b. mammals c. lizards d. snakes e. lobe finned lungfish 5. Which of the following groups of vertebrates are/were endothermic? a. amphibians b. crocodiles c. snakes d. cretaceous (after jurassic) dinosaurs e. None of the above are/were warm blooded. 6. An animal which obtains its body heat primarily from external sources is said to be: a. endothermic. b. exothermic. c. poikilothermic. d. warm blooded. e. heterotrophic.
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7. A feature characteristic of mammals which provides (or can provide) camouflage, insulation, and act as a sensory structure is: a. neurons. b. skin. c. hair. d. horns/antlers. e. scales. 8. One hundred million years ago these organisms occupied an ecological niche roughly equivalent in importance to that occupied by amphibians today. This group of organisms was the: a. insects. b. reptiles. c. birds. d. mammals. e. All of the above were very major groups 100 million years ago. None of the above is a correct answer. 9. The placenta is found in many or all members of which group(s)? a. birds b. mammals c. reptiles d. amphibians e. All vertebrates have a placenta at some time during their development. All of the above are therefore correct. 10.
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This note was uploaded on 04/15/2011 for the course BIOL 1720 taught by Professor Jagadeeswaran during the Spring '08 term at North Texas.

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Bio 1720 Exam1 - Name:_ Signature:_ Exam I, BIOL 1720...

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