An extant organism is found to be almost unchanged from its 200 million year old fossil.This is an example of:
A) stasis.
B) coevolution.
C) mass extinction.
D) adaptive radiation.
E) none of these.

Question

Quizplus · Accepted Answer

Stasis refers to the phenomenon where a species remains relatively unchanged over long periods of time, and this description fits the scenario presented in the question best. Coevolution refers to the reciprocal evolutionary changes between two or more species. Mass extinction refers to the simultaneous extinction of many species, typically associated with a catastrophic event. Adaptive radiation refers to the diversification of a single ancestral species into multiple new species over a relatively short period of time.

An Extant Organism Is Found to Be Almost Unchanged from Its