Examlex
Explain the difference between a symptom and a sign, and give an example of each.
Cenozoic Era
The current geological era, beginning 66 million years ago, following the mass extinction of the dinosaurs and characterized by the rise of mammals.
Comparative Morphology
Scientific study of similarities and differences in body plans.
Morphological Convergence
Evolutionary pattern in which similar body parts (analogous structures) evolve separately in different lineages.
Theory of Uniformity
A principle stating that the same natural laws and processes that operate in the universe now, have always operated in the universe in the past and apply everywhere.
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