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Characteristics of Life

Outlines the five characteristics that are used to define something as "alive."

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What's Your Type?
Teacher Contributed

What's Your Type?

Head Scratchers

Use the resources below to answer the following questions:

  1. What do taxonomists study? How does this benefit other disciplines of biology?
  2. What is a holotype? Why are these extremely useful distinctions for scientists? What does it allow them to evaluate?
  3. Would you like to be a holotype? Why or why not?
  4. What are some of the problems researchers face in classifying organisms? How do scientists approach these problems?
  5. Once an organism is classified, is this classification set in stone? Why or why not?

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