Somethings that could make it difficult to use the dichotomous key would be if the two organism you were trying to use with it, look exactly alike. For example, you may be looking at two different types of pines with very, very small details that are different. Another thing would be if you couldn't see the small characteristics on your organism<span />
Linnaeus. Carolus Linnnaeus is a Swedish naturalist whose lasting achievement is binomial nomenclature; it is a system of naming and classifying plants and animals according to genus and species.
