Where do volcanoes usually form? A. within 10 miles of the ocean
B. between Earth's mantle and core
C. at fault lines between tectonic plates
D. within the boundaries of the United States

c. at fault lines betwern tectonic plates

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

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explanation: