very+frequent
131Microsatellite (genetics) — This article is about the DNA sequence. For small orbiting spacecraft, see Miniaturized satellite. Microsatellites, also known as Simple Sequence Repeats (SSRs) or short tandem repeats (STRs), are repeating sequences of 2 6 base pairs of DNA.[1]… …
132Golden Age — The 17th century was a key period for Spain s cultural identity, one that determined its fate as a nation. The year 1492 is a landmark in Spanish history that marks the political rise of the country (at that time made up of the union of… …
