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.
Definition. A low white blood cell count, or leukopenia, is a decrease in disease-fighting cells (leukocytes) circulating in your blood. The threshold for a low white blood cell count varies from one medical practice to another. Some healthy people have white cell counts that are lower than what's considered normal. A count lower than 4,000 white blood cells per microliter of blood is generally considered a low white blood cell count. The threshold for a low white blood cell count in children varies with age and sex.