Bio1331 Animals - Evolution - Chordates And Jawless Fishes (Lecture Seven)

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| By Elly Crook
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Elly Crook
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Quizzes Created: 27 | Total Attempts: 10,312
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Bio1331 Animals - Evolution - Chordates And Jawless Fishes (Lecture Seven) - Quiz


Questions and Answers
  • 1. 

    What is the name given to the theory that claims that an organism's biological/embryological development parallels its species' evolutionary development?

    • A.

      Recapitulation Theory

    • B.

      Summarisation Theory

    • C.

      Theory of Development

    • D.

      Embryonical Evolution Theory

    Correct Answer
    A. Recapitulation Theory
    Explanation
    Recapitulation Theory is the name given to the theory that claims an organism's biological/embryological development mirrors its species' evolutionary development. This theory suggests that during its development, an organism goes through stages that resemble the evolutionary stages of its ancestors. This theory was proposed by Ernst Haeckel in the late 19th century and has since been revised and refined. It suggests that the development of an organism from embryo to adult can provide insights into its evolutionary history.

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  • 2. 

    Which of the following Scientists developed the Recapitulation Theory?

    • A.

      Ernest Haeckel

    • B.

      Charles Darwin

    • C.

      Ronald Fisher

    • D.

      J.S. Haldane

    Correct Answer
    A. Ernest Haeckel
    Explanation
    Ernest Haeckel developed the Recapitulation Theory. This theory, also known as the Biogenetic Law, suggests that the development of an organism from embryo to adult recapitulates or mirrors the evolutionary history of its species. Haeckel proposed that the stages of embryonic development in different organisms resemble the adult forms of their evolutionary ancestors, providing evidence for the theory of evolution. His work had a significant impact on the field of evolutionary biology and embryology.

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  • 3. 

    Name a clade of chordates.HINT: There are two, each with two variations on the name.

    Correct Answer
    Tunicates
    Lancelets
    Cephalochordates
    Urochordates
    Explanation
    The correct answer is Tunicates, Lancelets, Cephalochordates, Urochordates. These are all different variations of the clade of chordates. Tunicates and Urochordates refer to the same group of marine animals, which includes sea squirts. Lancelets and Cephalochordates also refer to the same group, which includes small, fish-like marine animals. Both variations of the names are valid and commonly used to describe these clades of chordates.

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  • 4. 

    True or False?All chordates have a notochord.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    All chordates have a notochord. This is because a notochord is a defining characteristic of chordates. It is a flexible rod-like structure that provides support and serves as a precursor to the backbone in vertebrates. While the notochord may be present only during the embryonic stage in some chordates, it is still present in all chordates at some point in their life cycle. Therefore, it is true that all chordates have a notochord.

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  • 5. 

    Which of the following is true about the notochord of Lancelets/Cephalochordates?

    • A.

      The notochord measures the entire length of the Lancelet body and lasts its entire life

    • B.

      The notochord measures the entire length of the Lancelet body but only appears in embryonic development

    • C.

      The notochord measures a partial length of the Lancelet body and lasts its entire life

    • D.

      The notochord measures a partial length of the Lancelet body but only appears in embryonic development

    Correct Answer
    A. The notochord measures the entire length of the Lancelet body and lasts its entire life
    Explanation
    The notochord of Lancelets/Cephalochordates is a flexible rod-like structure that extends the entire length of the Lancelet body. It is present throughout the entire life of the Lancelet and provides support and structure. This distinguishes Lancelets from other chordates, such as vertebrates, where the notochord is only present during embryonic development and is later replaced by the vertebral column.

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  • 6. 

    Which of the following is a Lancelet/Cephalochordate?

    • A.

      This one!

    • B.

      No, this one.

    • C.

      It's definitely this one.

    • D.

      I'm pretty sure crabs are Lancelets?

    Correct Answer
    A. This one!
    Explanation
    The correct answer is "This one!" because lancelets, also known as cephalochordates, are a type of marine chordate that have a long, slender body and a notochord that extends the length of their body. The given answer implies that one of the options presented is a lancelet, but without additional information or context, it is not possible to determine which option is being referred to as "this one."

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  • 7. 

    True or False?A Urochordate/Tunicate has a notochord throughout its entire lifespan.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    They only have a notochord during larval stages.

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  • 8. 

    Which chordate clade may have ancestral chordates resembled?

    • A.

      Lancelets/Cephalochordates

    • B.

      Tunicates/Urochordates

    Correct Answer
    A. Lancelets/Cephalochordates
    Explanation
    Lancelets, also known as cephalochordates, are a chordate clade that may have resembled ancestral chordates. These small, fish-like marine animals possess many of the key characteristics of chordates, including a notochord, a dorsal nerve cord, and pharyngeal slits. They are considered to be the closest living relatives to the vertebrates and provide valuable insights into the evolutionary history of chordates. Tunicates, or urochordates, are another chordate clade but are more derived and have undergone significant evolutionary changes compared to lancelets. Therefore, lancelets/cephalochordates are a more likely candidate for resembling ancestral chordates.

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  • 9. 

    Check the traits that are commonly associated with vertebrates.

    • A.

      Rigid, internal skeleton

    • B.

      2 pairs of appendages

    • C.

      Anterior skull

    • D.

      Large brain

    • E.

      Advanced circulatory system

    • F.

      Internal organs suspended in large coelom

    • G.

      Flexible internal skeleton

    • H.

      Single pair of appendages

    • I.

      Many pairs of appendages

    • J.

      Posterior skull

    • K.

      Small brain

    • L.

      Simplistic circulatory system

    • M.

      Acoelomates

    Correct Answer(s)
    A. Rigid, internal skeleton
    B. 2 pairs of appendages
    C. Anterior skull
    D. Large brain
    E. Advanced circulatory system
    F. Internal organs suspended in large coelom
    Explanation
    The traits that are commonly associated with vertebrates include a rigid, internal skeleton, 2 pairs of appendages, an anterior skull, a large brain, an advanced circulatory system, and internal organs suspended in a large coelom. These traits are characteristic of vertebrates and distinguish them from other organisms.

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  • 10. 

    Name a clade of vertebrates.

    Correct Answer(s)
    Myxini
    Myxinis
    Hagfish
    Hagfishes
    Pentromyzontida
    Lamprey
    Explanation
    The correct answer is Myxini, Myxinis, Hagfish, Hagfishes, Pentromyzontida, Lamprey. These are all names of clades of vertebrates. Myxini refers to the clade that includes hagfish, while Lamprey refers to the clade that includes lampreys. Hagfishes and Pentromyzontida are alternative names for the clade that includes hagfish.

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  • 11. 

    Complete the following sentence:________ were the first vertebrates with mineralised skeletal elements in their mouth and pharynx.

    Correct Answer(s)
    N/A
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