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.
Low hemoglobin means that a person's hemoglobin level when measured, is below the lowest limits of normal for their age and sex (see above normal range of values). For example, a 19 year old male would have low hemoglobin if the detected blood value was below 13.6 g/dl. Another term frequently used in place of low hemoglobin is anemia, or the person is described as being anemic.