Exam the graphing show the abundance index of 3 species in this system. Which of the following is true? OTTER O when kelp abundance is high urchin and otter abundace is also high O when otter abundance is low kelp URCHIN abundance is high O when urchin abundance is low kelp and otter abundace is also low KELP 1930 1940 1950 1960 1970 1980 199o 2000 2010 2016 O when urchin abundance is high kelp Year and otter abundace is low INCLUDES HISTORICAL DATA

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Animal Phylogeny

Cladistics is a method of biological classification where organisms are classified based on their ancestors and their relationship with them. It is defined as the concepts and methods for determining the branching patterns of evolution and evolutionary history. Some scientists, however, have preferred the term phylogenetic systematics or phylogenetic taxonomy to emphasize the reliance on a phylogeny for classification. It is the most common and accepted method for classifying organisms.