Co evolution is distinguished from other evolutions because in co evolution both the organisms to be evolved to get benefit from each other. We can not treat both separately on the basis of environment or niche they occupied. The organisms belongs to different category such as Yucca (plant) and Pronuba moth (insect) both are coevolved for the pollination (for Yucca flower) and ovipositor (for Pronuba insect). Here we cannot treat both organisms evolution separately even though they required same condition ( their niche is different). If it is a normal evolution, we should consider both organisms evolution separately. (I considered Yucca and Pronuba example here since there is no specificity or clear in question about the organisms example) Solution Co evolution is distinguished from other evolutions because in co evolution both the organisms to be evolved to get benefit from each other. We can not treat both separately on the basis of environment or niche they occupied. The organisms belongs to different category such as Yucca (plant) and Pronuba moth (insect) both are coevolved for the pollination (for Yucca flower) and ovipositor (for Pronuba insect). Here we cannot treat both organisms evolution separately even though they required same condition ( their niche is different). If it is a normal evolution, we should consider both organisms evolution separately. (I considered Yucca and Pronuba example here since there is no specificity or clear in question about the organisms example).