Mutualism is the way two organisms of different species exist in a relationship in which each individual benefits from the activity of the other.Similar interactions within a species are known as co-operation.Mutualism can be contrasted with interspecific competition, in which each species experiences reduced fitness, and exploitation, or parasitism, in which one species benefits at the expense of the other. Mutualism is a type of symbiosis.utualism can be contrasted with interspecific competition, in which each species experiences reduced fitness, and exploitation, or parasitism, in which one species benefits at the expense of the other.
Example of Center of a Circle. 1  The constant distance from the center of the circle to any point on the circle is called the radius of the circle. 2  Diameter of a circle is the line segment connecting two points on a circle and passing through the center of the circle.
The diameter of a circle is the distance from a point on the circle to a point radians away, and is the maximum distance from one point on a circle to another. The diameter of a sphere is the maximum distance between two antipodal points on the surface of the sphere.