Levels of Biological Organization Quiz
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Questions and Answers

Which of the following best describes the tissue-organ grade of organization?

  • A collection of organs working together to perform various functions
  • Tissues organized into a system to perform a specific function
  • An aggregation of tissues that form organs with more specialized functions (correct)
  • A single type of tissue forming an organ with a basic function

What is a characteristic feature of flatworms in terms of organizational complexity?

  • Development of an intricate organ system
  • Presence of a single type of tissue forming all organs
  • Organization of tissues into a complex network
  • Possession of well-defined organs such as eyespots and proboscis (correct)

What distinguishes the organ-system grade of organization from the tissue-organ grade?

  • An aggregation of tissues forming specific organs
  • Tissues organizing into organ systems with specialized functions
  • Organs working together to perform some function (correct)
  • A single organ performing a specific function

What are the basic body functions associated with organ systems as mentioned in the text?

<p>Circulation, respiration, and digestion (D)</p> Signup and view all the answers

Which animal exhibits the organ-system grade of organization as described in the text?

<p>Nemertean worms with distinct digestive and circulatory systems (D)</p> Signup and view all the answers

Which grade of organization characterizes unicellular organisms?

<p>Protoplasmic (C)</p> Signup and view all the answers

Which organism demonstrates distinct somatic and reproductive cells at the cellular level of organization?

<p>Volvox (C)</p> Signup and view all the answers

Which group is largely of the cellular grade of organization because mast cells are scattered and not organized into tissues?

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

An excellent example of a tissue in cnidarians is the __________.

<p>Nerve net (B)</p> Signup and view all the answers

Which grade of organization involves an aggregation of similar cells into definite patterns or layers to perform a common function?

<p>Cell-tissue (B)</p> Signup and view all the answers

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