In the list definition XML, add a ContentTypeRef element to the ContentTypes element. Set the ID attribute of the ContentTypeRef element to the content type ID of the content type that you want to include on the list.or more information about the ContentTypes element in the list definition schema, see ContentTypes Element (List) . Adding Content Types to an Existing SharePoint List. You can use the SharePoint Foundation object model to add content types to an existing list.
Prokaryotic Cell Structure. Prokaryotic cells are not as complex as eukaryotic cells. They have no true nucleus as the DNA is not contained within a membrane or separated from the rest of the cell, but is coiled up in a region of the cytoplasm called the nucleoid. Prokaryotic organisms have varying cell shapes.
A prokaryotic cell is normally a bacteria. A prokaryotic cell does not have a membrane around it's nucleus, it has loops of DNA free in its cytoplasm. A eukaryotic cell is any cell with many organelles (other parts which help it function) and a membrane-bound nucleus.