Dimorphism

Dimorphism 1. (Botany) the occurrence within a plant of two distinct forms of any part, such as the leaves of some aquatic plants 2. (Zoology) the occurrence in an animal or plant species of two distinct types of individual 3. (Chemistry) a property of certain substances that enables them to exist in two distinct crystalline forms 

Dimorphism in a echinoderm: four- and five-arm starfish 

 Dimorphism in a plant with two distinct flowers: yellow male and red female

Dimorphism in insects: winged male and wingless female Orgya bagworm

Dimorphism in fowls: peacock displays highly decorated plumes to woe a peahen