Sentences with phrase «modern classification schemes»
Modern classification schemes are driven by somewhat rigid categorizations inherent in DNA and common ancestry.
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Most modern advanced classifications use schemes with at least 2 variables / factors to describe political orientation.
Later, in 1953, after some revisions of list of standard stars and classification criteria, the scheme was named the Morgan — Keenan classification, or MK (by William Wilson Morgan and Philip C. Keenan's initials), [17] and this system remains the system in modern use today.