A small flowering plant widely used in genetic and molecular biology research; its genome was the first plant genome completely sequenced.
From Latin 'Arabis' (rockcress plant genus) + Greek 'opsis' (appearance, resemblance). The scientific name literally means 'resembling Arabis.' The full species name is Arabidopsis thaliana.
Arabidopsis thaliana became the 'laboratory mouse' of botany because it has a tiny genome, grows quickly, and produces lots of seeds. Its complete genetic sequence unlocked how plants work at a molecular level, fundamentally changing biology.
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