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.
Twenty four miles from Kalka, the railway line is 5,200 feet above sea, where it falls to 4,900 feet at Solan, and further to 4,667 feet at Kandaghat (36-and-a half miles from Kalka), where the final ascent to Shimla starts.