Marine Biology: Cartilaginous Fishes
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Questions and Answers

What is a characteristic of animals?

  • Lacking sensory organs
  • Having a poorly developed nervous system
  • Being warm-blooded
  • Being Poikilotherms (correct)
  • What sense is especially well-developed in animals?

  • Hearing
  • Taste
  • Sight
  • Smell (correct)
  • Which of the following is true about the nervous system of animals?

  • It is absent
  • It is poorly developed
  • It is well-developed (correct)
  • It is moderately developed
  • What type of system do animals have?

    <p>Poikilothermic</p> Signup and view all the answers

    Which of the following is a characteristic of an animal's sensory organs?

    <p>They are well-developed</p> Signup and view all the answers

    What is the other name of the class of general characters, cartilaginous fishes?

    <p>Elasmobranchiata</p> Signup and view all the answers

    What type of environment do animals of this class typically inhabit?

    <p>Marine</p> Signup and view all the answers

    How many species of this class can be found in freshwater?

    <p>Few</p> Signup and view all the answers

    What type of tissue do the skeletons of this class consist of?

    <p>Cartilaginous</p> Signup and view all the answers

    What is the general term for animals of this class?

    <p>Cartilaginous fishes</p> Signup and view all the answers

    What is a characteristic of eyes in cartilaginous fishes?

    <p>They are lacking eyelids.</p> Signup and view all the answers

    How many nostrils do cartilaginous fishes have?

    <p>Two</p> Signup and view all the answers

    What is the primary function of nostrils in cartilaginous fishes?

    <p>To smell</p> Signup and view all the answers

    Where are the nostrils located in cartilaginous fishes?

    <p>Anterio-ventrally</p> Signup and view all the answers

    What is a characteristic of nostrils in cartilaginous fishes?

    <p>They are internally closed.</p> Signup and view all the answers

    What is the primary classification of the dogfish shark?

    <p>Fish</p> Signup and view all the answers

    In which type of environment is the dogfish shark typically found?

    <p>Mud, Sand, and Rocky Reefs</p> Signup and view all the answers

    What is the maximum depth at which the dogfish shark can be found?

    <p>2400 ft</p> Signup and view all the answers

    What is a common predator of the dogfish shark?

    <p>Killer Whales</p> Signup and view all the answers

    What is a type of food that the dogfish shark feeds on?

    <p>Squid</p> Signup and view all the answers

    What is the typical depth range for most members of the Squalus genus?

    <p>200-2000 m</p> Signup and view all the answers

    What is unique about the habitat of Squalus acanthias?

    <p>It is the only one that frequents coastal habitats</p> Signup and view all the answers

    What is the name of the species that is known to frequent coastal habitats?

    <p>Squalus acanthias</p> Signup and view all the answers

    What is the common characteristic of most Squalus genus members?

    <p>They are bathyal and benthopelagic</p> Signup and view all the answers

    What is the typical habitat of Squalus genus members, excluding Squalus acanthias?

    <p>Bathyal and benthopelagic zones</p> Signup and view all the answers

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