noun
MRCA stands for Most Recent Common Ancestor, referring to the most recent individual from which all organisms in a group are directly descended.
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The MRCA of all modern humans lived in Africa around 200,000 years ago.
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The MRCA of all of us was apparently a cool dude from Africa.
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Yo, did you know we all share a common ancestor called the MRCA?
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The MRCA is like the ultimate family tree root for all of humanity.