In a cladogram, what occurs at a node?
a derived trait appears.
evolution is stopped.
an ancestor dies.
the cladogram ends.

A derived trait appears.

A cladogram is a diagram which is used to show evolutionary relationships among organisms. Each node in a cladogram represents a common ancestor that gives rise to descendants. It represents the similarity in traits from the ancestors to the descendants.

the  frequency of a wave represents  the number of wavelengths that pass a specific point per second. the unit for  frequency  is hertz (hz).

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some scientists like gregory adcock agree with thorne's theory of regional continuity.

others, like chris stringer and ian tattersall, believe thorne's results may be contaminated or misinterpreted.