Organisms who are able to freely interbreed producing fertile offsprings and having similar blue print for making these organisms are referred to as

Step-by-step solution

The term species was given by John Ray and is the lowest category of classification. Species is a group of closely related individuals having similar morphological, anatomical, biochemical and cytological characteristics. It consists of naturally interbreeding population with the ability to produce fertile offsprings. This group is reproductively isolated and genetically closed.