Animal Kingdom Chapter 4: Basis of Classification
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Questions and Answers

What is the level of organization of cells in sponges?

  • System level
  • Organ level
  • Cellular level (correct)
  • Tissue level
  • What is the main reason for the need of classification of animals?

  • To study the evolution of animals
  • To assign a systematic position to newly described species (correct)
  • To identify the differences in structures and forms
  • To group animals based on their habitat
  • Which feature is used as the basis of animal classification?

  • Nature of habitat
  • Arrangement of cells (correct)
  • Body size
  • Dietary habits
  • In which group do the cells performing the same function arrange into tissues?

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

    What is the total number of described species of animals till now?

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

    Why are fundamental features common to various individuals used as the basis of animal classification?

    <p>To assign a systematic position to newly described species</p> Signup and view all the answers

    Which level of organization is exhibited by members of Platyhelminthes and other higher phyla?

    <p>Organ level</p> Signup and view all the answers

    What is the term used for animals that can be divided into identical left and right halves in only one plane?

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

    What type of animals have cells arranged in two embryonic layers, an external ectoderm, and an internal endoderm?

    <p>Diploblastic animals</p> Signup and view all the answers

    What is the term used for the presence or absence of a cavity between the body wall and the gut wall?

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

    Which type of symmetry categorizes animals where any plane that passes through the center does not divide them into equal halves?

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

    What is the term used for the animals that have a third germinal layer, mesoderm, in between the ectoderm and endoderm during development?

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

    In which type of digestive system does an animal have only a single opening to the outside of the body serving as both mouth and anus?

    <p>Incomplete digestive system</p> Signup and view all the answers

    What type of animals has organs associated to form functional systems, with each system concerned with a specific physiological function?

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

    Which type of symmetry categorizes animals where any plane passing through the central axis divides the organism into two identical halves?

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

    Animals with a cavity between the body wall and the gut wall lined by mesoderm are called __________.

    <p>Coelomate animals</p> Signup and view all the answers

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