A particular plant species is pollinated by a certain insect species. The insect species depends on the plant species for food. This relationship is based on co-adaptation.
Here co-adaptation refers to the mutual adaptation between the given species(plants and insects) that depend upon each other.
Mendel disproved the blending theory of genetics when he cross pollinated tall and short pea plants and the offspring were either tall or short, not medium like the blending theory of genetics suggests.