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Why did Jefferson overcome his doubts about the constitutionality of the Louisiana Purchase?
Darwinʼs Theory
The scientific theory of biological evolution by natural selection, proposed by Charles Darwin, explaining how species evolve over generations through inherited variations.
Descended
Having a lower position or moving downward; in biology, it can refer to the process of an organ or species originating from a common ancestor.
Existing Organisms
Living entities that currently inhabit the planet, encompassing a wide diversity of life forms from single-celled bacteria to multicellular organisms.
Environmental Changes
Alterations in the surrounding conditions of an environment which can be natural or induced by human activities.
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