What is one similarity between ellis island and angel island? both served immigrants of mostly european descent. both served immigrants of mostly asian descent. both often detained immigrants for weeks or months. both required that immigrants pass health inspections.

The correct answer is Both required that immigrants pass health inspections

This was done to prevent people from starting epidemics in the US. They weren't both about only Europeans or only Asians, and they didn't both detain for weeks or months. Although there were differences in average wait time before being admitted, not many people actually stayed for months compared to the number of people that quickly entered.

The one similarity between Ellis Island and Angel Island is that "both required that immigrants pass health inspections." Both were the place where immigrants were held for long periods of time before being allowed in to the US. In Angel island, immigrants are coming from the pacific rim while the Ellis island are mostly Europeans. Angel island is located

The answer is crop yield.