Answer: Contour
Explanation: <u><em>Hope this helps</em></u>
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Answer:
Dichotomous keys typically stress identifying species by their scientific name, as each individual species has a unique scientific name. Dichotomous are very useful because they allow non-expert users to identify organisms by directing them to look at the known, important organisms.
Explanation:
Invertebrates
in- = not
vertebra = spine