What does compent circles represent

important circle parts

Radius: the distance from the center of the circle to its outer rim.

Chord: A line segment whose endpoints are on a circle

Diameter: A chord that passes through the center of the circle

Hope this helps :)

b. regulated is the actual answer to your question.

explanation:

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: