The area that is today the center of Allentown was laid out as Northampton Town in 1762 by William Allen, a wealthy shipping merchant, former mayor of the city of Philadelphia and then-Chief Justice of the Province of Pennsylvania.
Mitochondria and Chloroplasts are known to have their own DNA and make their own proteins. According to endosymbiosis theory, these organelles were known to have moved into eukaryotic cell in the form of vesicles when they came into contact with prokaryotes. :) Views.
In cell biology, an organelle is a specialized subunit within a cell that has a specific function. Individual organelles are usually separately enclosed within their own lipid bilayers. The name organelle comes from the idea that these structures are parts of cells, as organs are to the body, hence organelle, the suffix -elle being a diminutive. Organelles are identified by microscopy, and can also be purified by cell fractionation. There are many types of organelles, particularly in eukaryotic cells. While prokaryotes do not possess organelles per se, some do contain protein-based bacterial microcompartments, which are thought to act as primitive organelles.