Name: ______period ______Date ______
Take Home Chordata Unit Exam
If the test is returned without the scantron 10% will be deducted from the grade
1.. Due to their shape the scales of a shark are considered modified
A) scales B) teeth C) Cycloids D) Gills
2. Ampullae of Lorenzini are used by Sharks to detect ______in the water
A) Electrical Impulses B) Movement C) Sounds D) Blood
3. Jawless fish have no jaws or _____.
A) tongues B) scales C) muscles D) gills
Use the above diagram for questions 4-7
Match the letter to the corresponding part based on the diagram above
4. ______Dorsal Fin 5.______Claspers
6. ______Pectoral fin 7. ______Cadual Fin
8. Countershading on a shark will result in the ______side being darker to blend into the substrate
and the ______side being lighter to blend into the surface.
A) Lateral , Pectoral B) Ventral, Dorsal C) Dorsal, Ventral D) Posterior, Anterior
9. The most primitive fish whose charateristics include lacking paired fins, jaws or scales
are the ______fish
A) Bony B) Cartilaginous C) Jawless D) Invertebrate
10. Bony fish regulate buoyancy with the use of a(n) ______
A) Terminal Mouth B) Swim Bladder C) Operculum D) Fin Rays
11. Sharks and Rays have flatten bodies perfect for their demersal lifestyle
Also have their mouth on their ______side
A) Ventral B) Dorsal C) Caudal D) Lateral
12. Sharks and fish both use their ______fin for propulsion
A) Dorsal B) Ventral C) Pectoral D) Caudal
13. ______are oviparous and have fleshly tails with small fins. Their egg cases are common on beaches here in the northeast.
A) Rays B) Sharks C) Skates D) Bony fish
14. Organisms which have live births are considered
A) Oviparous B) Ovoviviparous C) Hermaphroditic D) Viviparous
15. Organisms in which the egg is formed but is kept inside of the mother during development is considered
A) Oviparous B) Ovoviviparous C) Hermaphroditic D) Viviparous
16. Organisms which lay eggs or egg cases are considered
A) Oviparous B) Ovoviviparous C) Hermaphroditic D) Viviparous
17. The lateral line which is common to both cartilaginous fish and bony fish is used to detect
A) Electrical Impulses B) Movement C) Sounds D) Blood
18. The olfactory bulbs which make up two thirds of the brain, in the shark, are devoted to the sense of
A) Electrical Impulses B) Sight C) Sounds D) Smell
19. Sharks can detect the presence of blood from ______a mile away
A) ¼ B) ½ C) 1 D) 2/3
20. The shape of shark scale is
A) Cycloid B) Placoid C) Denticloid D) Cencloid
21. ______allow sharks to pump water through their gills when there mouth is engaged
A) Scales B) Nostrils C) Spiracles D) Gill Arches
22. The supporting structures for gills are the
A) Lamellae B) Gill Rakers C) Gill Arches D) Gill Bones
23. In Sharks ______evolved from the support structures of the pharyngeal gills slits.
A) Jaws B) Gills C) Spines D) Condocranium
24. The Sharks jaw is attached to the chondrocranium with
A) Tendons B) Ligaments C) Muscles D) Bone tissue
58. Sharks have ______suspension of jaw
A) Stylistic B) Triploblastic C) Amphistylic D) Pinneped
25.______make up 98% of all fish
A) Agnatha B) Chondrichthyes C) Osteichthyes D) Cetaceans
26. Which is NOT a trait of Osteichthyes
A) terminal mouth B) Oviparous C) Swim Bladder D) Operculum
27. Flap which covers the gills of the Osteichthyes
A) Operculum B) Lamellae C) Claspers D) Swim Bladder
28. Blood and water move ______in the bony fish gill structure
A) Co-current B) Counter current C) concurrent D) divergently
29. The gas which is transferred into the fishes bloodstream at the gills is
A) Nitrogen B) Oxygen C) Carbon Dioxide D) Ammonia
30. The process by which gases pass across the membrane into the bloodstream is
A) Osmosis B) Diffusion C) Active Transport D) Membrane Transferance
For questions 31- 33 use the following choices
A) Gill Filaments B) Gill Rakers C) Gill Arches D) Lamellae
34. Many top level predators such as tuna, shark and barracuda maintain body temperature higher than their environment which classify them as
A) Ectothermic B) Endothermic C) Hypothermic D) Icthothermic
35. Jawless fish such as the Lamprey and the Hagfish are in the Phylum chordata and the class
A) Agnatha B) Chondrichthyes C) Osteichthyes D) Chordata
36.Bony fish such as the Tuna and the Trout are in the Phylum chordata and the class
A) Agnatha B) Chondrichthyes C) Osteichthyes D) Chordata
37. Which is NOT a trait found in all Chordata
A) Post Anal Tail B) Notochord C) Vertebrate D) Pharyngeal gill slits
38. The nerve chord on a Lancelet is found on its ______side
A) Dorsal B) Ventral C) Lateral D) Posterior
39. Tunicates (Sea Squirts) are
A) Urochordates B) Cephalochordates C) Vertebrates D) none of these
40.. Lancelets are ______Compressed (flattened).
A) Dorsal Ventrally B) Laterally C) Posteriorly D) Pectorally
41. There are ______classes of Vertebrates
A) 3 B) 4 C) 5 D) 2
42. Smell receptorsfound on the mouth, lips, skin and fins of bony fish are called
A) Chromatophores B) Denticles C) Ampullae of Lorenzini D) Chemoreceptors
43. For Buoyancy Sharks have a large ______oil filled ______
A) 2 lobed, Kidney B) 3 chambered, Heart C) 3 lobed, Liver D) 2 Chambered, Liver
44. Sailfish can swim at a maximum speed of ______MPH
A) 40 B) 25 C) 70 D) 45
45. The Largest bony fish is the
A) Whale Shark B) Blue Whale C) Moonfish D) Sunfish
46. The false eye is an example of
A) Bioluminescence B) Camouflage C) Cryptic Coloration D) Countershading
A)Ctenoid B) Placoid C) Cycloid D) Ganoid
47_____ 48. ______49. ______
50. What type of caudal is seen in these yellowfin tuna
A) Heterocercal B) Homocercal C) Intracecal D) Lunate
Short Answer: Explain why the counter current flow of water and blood in the gill structure is more efficient than it running concurrently. Make sure you include the role of diffusion and a state of equilibrium in your answer.
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