With the survival of one unknown taxon of __________ at the end of Cretaceous, the Cenozoic radiation of mammals was possible.

Question

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The Cenozoic radiation of mammals refers to the rapid diversification and expansion of mammals during the Paleogene and Neogene periods, which followed the extinction of non-avian dinosaurs at the end of the Cretaceous. This radiation was made possible by the survival of one unknown taxon of placental mammals, which were able to exploit the available ecological niches and diversify into numerous lineages, including primates, carnivores, ungulates, rodents, and bats. The other options, including marsupials, therapsids, and multituberculates, did not play a significant role in the Cenozoic radiation of mammals, and were either restricted to specific ecological niches or became extinct before or during the Cretaceous-Paleogene extinction event.

With the Survival of One Unknown Taxon of __________ at the End