In this article we will discuss about Polymorphism in Cnidarians:- 1. Definition of Polymorphism 2. Causes of Polymorphism 3. Basic Units 4. Origin 5. Significance. Definition of Polymorphism: Polymorphism may be defined as the "phenomenon of existence of different physiological and morphological forms represented by an extensive range of variation within a single species". It may be defined in another [...]
In this article we will discuss about Corals:- 1. Definition of Corals 2. Structure of Coral 3. Types 4. Formation. Definition of Corals: The hard external skeleton of certain solitary and colonial marine anthozoan cnidarians; composed chiefly calcium carbonate. Structure of Coral: Coral is secreted by some coral forming actinozoa. The skeleton of a solitary polyp is known as the [...]
In this article we will discuss about Cnidaria:- 1. Definition and Origin of Cnidaria 2. Habit and Habitat of Cnidaria 3. Characteristic Features 4. Classification. Definition and Origin of Cnidaria: Diploblastic metazoans with radial symmetry, tissues but rarely organs and a single central body cavity with mouth and tentacles but no anus, and the stinging cells or nematocysts, and with [...]