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What is a dichotomous key and how do I use one to identify an organism?

Biology

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Answer

A dichotomous key is a tool used to identify organisms by presenting a series of choices between two contrasting characteristics. By following the correct path based on the organism's features, you can narrow down its identity.

Step-by-step solution

2 steps

Here's how to use the key provided:

  1. Observe the organism*.

    Determine if it is microscopic (requiring a microscope to see) or macroscopic (visible to the naked eye). This initial observation directs you to the correct section of the key (Microscopic Organisms, Macroscopic Organisms, or Chordates).

  2. Follow the path*.

    At each numbered step, you will find two contrasting statements. Choose the statement that best describes your observed organism.

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