Mitochondria are unusual organelles. They act as the power plants of the cell, are surrounded by two membranes, and have their own genome. They also divide independently of the cell in which they reside, meaning mitochondrial replication is not coupled to cell division.itochondria are unusual organelles. They act as the power plants of the cell, are surrounded by two membranes, and have their own genome. They also divide independently of the cell in which they reside, meaning mitochondrial replication is not coupled to cell division.
U.S. immigration law is very complex, and there is much confusion as to how it works. The Immigration and Naturalization Act (INA), the body of law governing current immigration policy, provides for an annual worldwide limit of 675,000 permanent immigrants, with certain exceptions for close family members.
As the number of younger immigrants who naturalize increases, the number of older parents eligible to immigrate will also increase. Today, older immigrants account for 12 percent of the 40.4 million elderly in the United States and for 12 percent of the 40 million immigrant population.With May designated as Older Americans Month, we present this Spotlight focusing on older immigrants (age 65 and older) residing in the United States.lder immigrants made up about 12 percent of all immigrants in 2010. U.S.-born seniors accounted for 13 percent of the 269.4 million native-born population, whereas older immigrants accounted for 12 percent of the roughly 40 million immigrants in the United States (see Figure 2).