Examlex
Throughout the 1850s the major obstacle blocking adoption of a plan for building a transcontinental railroad was the
Gradualism
A theory in evolutionary biology that posits species evolve through small, incremental changes over long periods.
Punctuated Equilibrium
Punctuated Equilibrium is an evolutionary theory proposing that species evolve rapidly during short periods of time, followed by long periods of stasis (little or no evolutionary changes).
New Species
A population of organisms that has evolved distinct characteristics, differentiating it from other species.
Intermediate Forms
Organisms or structures that show characteristics bridging two different groups, often seen in evolutionary contexts.
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