When was the last epoch in which organisms could start walking across the bering strait and panama canal? pliocene pleistocene holocene eocene

The answer is; Holocene.

The Bering Strait is located in the Arctic circle and is a small continental gap between Russia and Alaska. About 11, 000 years ago, the ice age locked up most of the water the polar circles hence the ocean levels were lo exposing the Bering Strait crossing. This allowed organisms to cross between the two continents.

google my dude. if it doesn't show up ask me.