The below mentioned article provides an overview on International Code of Zoological Nomenclature:- 1. Brief History of International Code of Zoological Nomenclature 2. Parts of International Code of Zoological Nomenclature 3. Rules. Brief History of International Code of Zoological Nomenclature: The need for a code to give a scientific name to every species was first realised by British Association for [...]
In this article we will discuss about the body organisation and development of animals. Animal kingdom is divided into two major groups on the basis of number of cells which constitute the body of animals. These groups are called Protozoa and Metazoa. The protozoans are unicellar, eukaryotic, and heterotrophic animals, perform all sorts of basic functions like a metazoan animal. [...]
In this article we will discuss about the embryonic development of egg and yolk in insects and birds. Egg: The eggs are generally spherical but eggs of insects are elongated and cylindrical. The eggs of some polychaetes, fishes and birds are oval in shape. The egg cells are covered by plasma membrane which is secreted by egg cytoplasm (ooplasm). The [...]