Mutualism Relationships. Like humans, other living species, such as animals, plants and other bacteria too, help each other for better survival. No living organism can survive in isolation. All the living organisms depend on each other for food or shelter.
The definition of low is  something with little height, emotionally depressed, below the surface level, quiet or deep in pitch. An example of low is fog resting on the ground. An example of low is someone feeling sad. An example of low is speaking quietly.
Define low frequency. low frequency synonyms, low frequency pronunciation, low frequency translation, English dictionary definition of low frequency. n. Abbr. LF A radio frequency in the range from 30 to 300 kilohertz. n 1. a radio-frequency band or a frequency lying between 300 and 30 kilohertz.