1 The cell is the basic unit of all forms of life. However, there are several levels of cell organization within many multicellular organisms. Cells are arranged in hierarchical levels of organization.  The lowest form of organization is the cell followed by tissues, organs, and organ systems.
Distance between Kannur to Kottayam is 326 km by Road and 342 km by Rails. Aerial distance is 283 km.
Pir Panjal Railway Tunnel. Coordinates: 33Â°30â²45â³N 75Â°11â²50â³E / 33.5124345Â°N 75.1970923Â°E / 33.5124345; 75.1970923. The Pir Panjal Railway Tunnel or Banihal railway tunnel is an 11.215 km (7 mile) railway tunnel located in Pir Panjal Range of middle Himalayas in Jammu and Kashmir, India, north of Banihal town.