Examlex
Before World War I, the most important region of the world for the United States was __________.
Adaptive Radiation
An evolutionary lineage that has undergone exceptionally rapid diversification into a variety of lifestyles or ecological niches.
Ecological Niches
Specific positions or roles played by organisms within their environment, considering how they obtain their energy and nutrients, and interact with other organisms.
Clades
Clades are groups of organisms that are classified together based on sharing a common ancestor, thereby forming a branch on the tree of life.
Fossil Record
The collection of physical remains of organisms from the past, preserved in Earth's crust, which provides evidence of the history of life.
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