Ordinary tank versions were also frequently modified. Engine, transmission and suspension were slightly modified and improved. Finally, the starch may be modified for specific purposes. Chickens have been genetically modified for a variety of purposes. Before delivery, they were modified to EF-18A+ standard. The muscular system has been similarly modified. In addition, they can be chemically modified. Sometimes the same virus can be modified for contrasting purposes. It has since been modified and extended. Sausages can also be modified to use indigenous ingredients. Tanks have often been modified for special purposes. It also can be modified to provide stable behavior. RNAs are often modified by enzymes after transcription. Patents connected with the extensively modified Mk. The aircraft will be modified and designated F-35I.