Soon after the island of Hawaii rose above the sea surface (somewhat less than 1 million years ago) and organisms colonized the island, the evolution of life on this new island should have been most strongly influenced by . Map of the chain of the Hawaiian Islands, described roughly from the northwest toward the southeast: Kauai, 5.1 million years (medium-sized island); Oahu, 3.7 million years (medium-sized island); Molokai and Lanai (two small islands near an even smaller, unlabeled island); Maui, 1.3 million years (medium-sized island); Hawaii, 0.4 million years (largest island). Soon after the island of Hawaii rose above the sea surface (somewhat less than 1 million years ago) and organisms colonized the island, the evolution of life on this new island should have been most strongly influenced by . sexual selection a genetic bottleneck habitat differentiation founder effects