Louisiana State University
OCS 1005
OCS 1005 EXAM 3 - SUTOR Quiz 12: 1. What animal is transitional between invertebrates and vertebrates? What are two characteristics it and all other chordates possess? a. Amphioxus or lancets. It has a notochord, a tubular dorsal nervous system, and gill slits at some point in development. 2. What important evolutionary advancement did Cn
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OCS 1005 EXAM 3 - SUTOR Quiz 12: 1. What animal is transitional between invertebrates and vertebrates? What are two characteristics it and all other chordates possess? a. Amphioxus or lancets. It has a notochord, a tubular dorsal nervous system, and gill slits at some point in development. 2. What important evolutionary advancement did Cnidarians make over sponges and what does it allow them to do? a. Cnidarians evolved specialized tissues which sponges do not have. This permits coordinated activities such as swimming, feeding, and response to external stimuli 3. What do sea turtles and other marine reptiles still depend on land for? a. To lay their eggs 4. What are two ways that sharks can sense prey? a. Low-frequency vibrations (Lateral line), Water-borne odors (Olfactory pits on the underside of the snout), Vision, Electro-magnetic fields (Ampullae of Lorenzini) 5. What are two adaptations to deep diving that marine mammals use? a. Increased oxygen capacity of blood, Slowing of heart rate (bradycardia), Restriction of blood flow to non-critical areas, Tolerance of anaerobic conditions 6. Name two different coloration strategies that bony fishes use and what the purpose of the strategy is. a. (disruptive is used to confuse predators in general, including the way that you mentioned) 7. What do the largest members of the chondrichthyes and the cetaceans have in common? a. They are planktivorous 8. What change on Earth made the rise of animals possible and how did this happen? a. Photosynthetic bacteria produced oxygen and when enough built up in the atmosphere it made it possible for animals, which require oxygen, to thrive 9. What evolutionary advancement do Turbellarians have over Cnidarians? a. They have tissues organized into organs and organ systems 10. Give an example of a cephalopod and two characteristics of this group of animals. a. Cephalopods include squid, cuttlefish, octopus, and nautilus. They have modified their siphon for propulsion, are highly motile with large eyes, and have a complex nervous system
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