Radial Symmetry in Animals Quiz
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Questions and Answers

What type of symmetry do the animals in this group exhibit?

  • Bilateral symmetry
  • Asymmetry
  • Spherical symmetry
  • Radial symmetry (correct)

    • What is the term used to describe the condition where the animals are arranged around a central axis?

  • Diploblastic (correct)
  • Unicellular
  • Triploblastic
  • Multicellular

    • Which group of animals is provided as an example of diploblastic organization in the text?

  • Annelida
  • Mollusca
  • Cnidaria (coelenterata) (correct)
  • Platyhelminthes

    • Animals with radial symmetry included in this group are also triploblastic

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

    The body of a sea-anemone can be cut into two equal halves vertically in any plane

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

    All animals in this group exhibit bilateral symmetry

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

    Which group of animals exhibit radial symmetry and are also diploblastic?

    <p>Cnidaria (Coelenterata)</p> Signup and view all the answers

    What is the term used to describe the condition where the parts of the body are arranged around a central axis in such a way that any plane passing through the central axis divides the animal in halves that are almost mirror image of each other?

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

    Provide an example of an animal with radial symmetry and diploblastic organization described in the text.

    <p>Sea-anemone</p> Signup and view all the answers

    Animals with ______ symmetry included in this group are also diploblastic

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

    The cylindrical body of a sea-anemone can be cut in two equal halves vertically in any ______

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

    This is a condition or organization in which the parts of the body are arranged around a central ______

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

    Animals with ______ symmetry have been included

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

    The animals in this group are also ______

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

    The cylindrical body of a sea-anemone can be cut in two equal halves vertically in any ______

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

    What is the term used to describe the condition where the parts of the body are arranged around a central axis in such a way that any plane passing through the central axis divides the animal in halves that are almost mirror image of each other?

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

    What type of symmetry do the animals in this group exhibit?

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

    Provide an example of an animal with radial symmetry and diploblastic organization described in the text.

    <p>Cnidaria (coelenterata)</p> Signup and view all the answers

    What is radial symmetry and which group of animals exhibit this type of symmetry?

    <p>Radial symmetry is a condition in which the parts of the body are arranged around a central axis in such a way that any plane passing through the central axis divides the animal into halves that are almost mirror images of each other. The group of animals exhibiting this type of symmetry includes cnidarians (coelenterates) such as sea anemones.</p> Signup and view all the answers

    What is diploblastic organization and which group of animals have this characteristic?

    <p>Diploblastic organization refers to the condition in which the animals have two primary germ layers. All the animals with radial symmetry in the group exhibit diploblastic organization.</p> Signup and view all the answers

    Can you provide an example of an animal with radial symmetry and diploblastic organization described in the text?

    <p>An example of an animal with radial symmetry and diploblastic organization described in the text is the sea anemone, which has a cylindrical body that can be cut into two equal halves vertically in any plane.</p> Signup and view all the answers

    What is the characteristic organization of animals in the group Grade Radiata?

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

    Can you provide an example of an animal with radial symmetry and diploblastic organization as described in the text?

    <p>Cnidaria (coelenterata), such as a sea-anemone.</p> Signup and view all the answers

    How is the condition of organization in Grade Radiata described, and what type of symmetry do the animals exhibit?

    <p>The parts of the body are arranged around a central axis in such a way that any plane passing through the central axis divides the animal in halves that are almost mirror images of each other. The animals exhibit radial symmetry.</p> Signup and view all the answers

    Briefly explain what bilateral symmetry is and provide examples of animal phyla included in the grade Bilateria.

    <p>Bilateral symmetry is when an animal's right side is approximately the same as the left side and can be divided into two equal parts by an imaginary line in one plane. Animal phyla included in the grade Bilateria are Platyhelminthes, Nematoda, Annelida, Mollusca, Arthropoda, Echinodermata, Hemichordata, and Chordata.</p> Signup and view all the answers

    Describe the characteristics of animals in the grade Bilateria.

    <p>Animals in the grade Bilateria have a distinct anterior and posterior end, clearly defined dorsal and ventral surfaces, and are triploblastic. They may be acoelomate, pseudocoelomate, or coelomate.</p> Signup and view all the answers

    Explain the development of bilateral symmetry in Echinoderms and its significance.

    <p>Echinoderms have developed bilateral symmetry in their larvae, but as adults, they have secondarily developed radial symmetry due to their special mode of life.</p> Signup and view all the answers

    What is the significance of the inclusion of animals with bilateral symmetry in the grade Bilateria?

    <p>The inclusion of animals with bilateral symmetry in the grade Bilateria highlights their shared characteristic of having distinct anterior and posterior ends, clearly defined dorsal and ventral surfaces, and being triploblastic.</p> Signup and view all the answers

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