Bilaterian Animals Classification Quiz
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Questions and Answers

What major group of animals is characterized by fivefold symmetry and a water vascular system?

  • Cephalochordates
  • Annelid Worms
  • Echinoderms (correct)
  • Flat Worms

    • Which of the following phyla belongs to the superphylum Lophotrochozoa?

  • Vertebrates
  • Nematodes
  • Arthropods
  • Annelid Worms (correct)

    • What distinguishes chordates from hemichordates and echinoderms?

  • Mouth and Pharynx
  • Notochord (correct)
  • Fivefold symmetry
  • Pharyngeal Slits

    • Which phylum is known for its tube feet and fivefold symmetry in body structure?

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

    What is the main characteristic that sets nematodes apart from arthropods?

    <p>Ecdysis (molting)</p> Signup and view all the answers

    Which phylum includes species with a mantle, characteristic of their anatomy?

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

    What is a key characteristic used to differentiate cephalochordates from other chordates?

    <p>Lateral appendages</p> Signup and view all the answers

    What distinguishes vertebrates from cephalochordates and tunicates?

    <p>No mineralized skeleton</p> Signup and view all the answers

    Which superphylum includes annelid worms and mollusks?

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

    What is a characteristic feature of animals that distinguishes them from other organisms?

    <p>Heterotrophic nutrition</p> Signup and view all the answers

    Which of the following is NOT a characteristic of animals?

    <p>Cell walls in their cells</p> Signup and view all the answers

    In animal evolution, which key event occurred before the development of multiple complex tissues?

    <p>Simple tissue formation</p> Signup and view all the answers

    What is the main difference between diploblastic and triploblastic embryos?

    <p>Absence of mesoderm in triploblastic embryos</p> Signup and view all the answers

    Which kingdom is more closely related to animals, plants, and fungi according to DNA sequencing results?

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

    Which animal group is characterized by a hollow ball of cells in early embryonic development known as a blastula?

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

    What type of symmetry is typically observed in sponges like Porifera?

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

    What type of symmetry do all Cnidarians have?

    <p>Radial symmetry</p> Signup and view all the answers

    Which characteristic is common to all land animals?

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

    What becomes the mouth in protostomes during early development?

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

    Which characteristic is not present in Porifera?

    <p>Complex tissues</p> Signup and view all the answers

    What is the main difference between Protostomes and Deuterostomes?

    <p>Development of blastopore</p> Signup and view all the answers

    Which group includes organisms that are symmetrical along a central plane?

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

    What is the defining characteristic of all Cnidarians?

    <p>Mouth surrounded by tentacles</p> Signup and view all the answers

    What distinguishes Bilaterians from other animals?

    <p>Bilateral symmetry</p> Signup and view all the answers

    What is unique about Deuterostome development?

    <p>Blastopore becomes the anus</p> Signup and view all the answers

    What is a common feature of all Porifera?

    <p>Aquatic habitat</p> Signup and view all the answers

    What type of symmetry do all Porifera lack?

    <p>Bilateral symmetry</p> Signup and view all the answers

    Which of the following is NOT a characteristic of Cnidarians?

    <p>Bilateral symmetry</p> Signup and view all the answers

    What is the defining feature that sets Bilaterians apart from other animals?

    <p>Triploblastic tissue layers</p> Signup and view all the answers

    What is the main difference between diploblastic and triploblastic organisms?

    <p>Number of tissue layers</p> Signup and view all the answers

    Which characteristic is unique to Cnidarians among the listed animal groups?

    <p>A closed gastric cavity</p> Signup and view all the answers

    What is the primary distinction between protostomes and deuterostomes?

    <p>Development of the blastopore into mouth or anus</p> Signup and view all the answers

    Which feature is NOT typically observed in Porifera?

    <p>&quot;Bilateral symmetry&quot;</p> Signup and view all the answers

    What distinguishes all land animals?

    <p>&quot;Triploblastic tissue layers&quot;</p> Signup and view all the answers

    What is a common feature of all Bilaterians?

    <p>Triploblastic tissue layers</p> Signup and view all the answers

    What is a defining characteristic of Porifera such as sponges?

    <p>No specialized tissues</p> Signup and view all the answers

    Which key event in animal evolution occurred before the development of multiple complex tissues?

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

    What type of symmetry is typically observed in Cnidarians like jellyfish?

    <p>Radial symmetry</p> Signup and view all the answers

    What distinguishes Bilaterians from animals with radial symmetry?

    <p>Embryonic cell movement</p> Signup and view all the answers

    Which statement correctly describes Cnidarians?

    <p>Exhibit radial symmetry</p> Signup and view all the answers

    What feature sets Bilaterians apart from animals with radial symmetry?

    <p>Endoderm and mesoderm layers</p> Signup and view all the answers

    What characterizes the evolution of animals before the development of embryonic cell movement?

    <p>Simple tissues formation</p> Signup and view all the answers

    Which aspect differentiates Cnidarians from Bilaterians?

    <p>Radial symmetry</p> Signup and view all the answers

    What is a common characteristic between all Porifera organisms?

    <p>No cell walls</p> Signup and view all the answers

    In animal evolution, what significant feature occurred before the emergence of radial symmetry?

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

    What characteristic is unique to Porifera among the animals mentioned?

    <p>Absence of true tissues</p> Signup and view all the answers

    Which animal group is characterized by a blastula during early embryonic development?

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

    What is the defining characteristic common to all Cnidarians?

    <p>Radial symmetry</p> Signup and view all the answers

    What sets Bilaterians apart from other animals?

    <p>Presence of bilateral symmetry</p> Signup and view all the answers

    Which characteristic is NOT common to all animals?

    <p>Radial symmetry</p> Signup and view all the answers

    What type of symmetry is typically observed in Porifera?

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

    What separates animals with bilateral symmetry from those with radial symmetry?

    <p>Presence of identical halves divided along a central linear axis.</p> Signup and view all the answers

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