Assertion: angiosperm | /r/CapableOf | originate before cretaceous period
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Source sentences:
text: Models based on comparisons of plant DNA changes over time (Magallón et al., 2015) and a study of geochemical biomarkers by the present authors and others (Taylor et al., 2006) suggest that angiosperms originated before the Cretaceous period (which started 145 million years ago), and perhaps even before the Jurassic period (which started 201 million years ago).