Cephalaspidomorphi Flashcards
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Questions and Answers

What are the environments of cephalaspidomorphi?

  • Arctic tundra
  • Desert
  • Temperate marine and freshwater (correct)
  • Tropical rainforests
  • To other fish, cephalaspidomorphi are...

    Ectoparasites

    What fins do cephalaspidomorphi have?

    Dorsal and caudal fins

    The gill slits of cephalaspidomorphi are internal.

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

    How many vertebrae do cephalaspidomorphi have?

    <p>1</p> Signup and view all the answers

    Where is the brain of cephalaspidomorphi located?

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

    What kind of eyes do cephalaspidomorphi have?

    <p>Pineal eyes</p> Signup and view all the answers

    What do cephalaspidomorphi have instead of a jaw?

    <p>Sucking mouth parts</p> Signup and view all the answers

    Why don't cephalaspidomorphi have true teeth?

    <p>They are not associated with the nervous system</p> Signup and view all the answers

    What kind of tongue do cephalaspidomorphi have and how do they use it?

    <p>Rasping tongue</p> Signup and view all the answers

    Their lifecycle involves swimming to freshwater environments to ______.

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

    Describe the breeding process of cephalaspidomorphi.

    <p>The female suctions to a rock, and the male wraps around her to fertilize the eggs externally.</p> Signup and view all the answers

    What happens when the eggs of cephalaspidomorphi hatch?

    <p>They produce larvae which are sessile filter feeders.</p> Signup and view all the answers

    Study Notes

    Cephalaspidomorphi Overview

    • Inhabit temperate marine and freshwater environments.
    • Characterized as ectoparasites, attaching to other fish for sustenance.

    Morphological Features

    • Possess dorsal and caudal fins that aid in movement.
    • Have external gill slits necessitating constant movement or water flow for respiration.
    • Exhibit a singular vertebra that supports their structure.
    • The brain is located dorsally within their anatomy.

    Sensory and Feeding Adaptations

    • Pineal eyes serve as life-detecting organs, contributing to their sensory perception.
    • Instead of jaws, they feature sucking mouthparts for attachment and feeding.
    • Lack true teeth as these structures are not associated with their nervous system.
    • Utilize a rasping, muscular tongue equipped with tooth-like structures to scrape and access host tissue, aided by salivary glands that produce anticoagulants.

    Lifecycle and Reproduction

    • Adults primarily reside in ocean environments before migrating to freshwater to breed.
    • Reproductive behavior involves females suctioning to rocks while males wrap around, facilitating external fertilization as eggs and sperm are released simultaneously.
    • Upon hatching, larvae possess an atrium and atrial pore; juvenile stages function as sessile filter feeders for approximately three years before transitioning to free-swimming adults.

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    Description

    Test your knowledge of cephalaspidomorphi with these flashcards. This quiz covers various aspects of their characteristics, habitats, and biological features. Perfect for students studying marine biology or related fields.

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