In this article we will discuss about the Characters and Classification of Chordates. Characters of Chordates: All the chordates possess four diagnostic characters either in the embryonic or adult stage. 1. Notochord: It is a solid un-jointed, stiff but flexible rod-like structure situÂated on the dorsal side between the dorsal hollow nerve cord and the alimentary canal. 2. Dorsal Hollow [...]
In this article we will discuss about the General Characters and Classification of Class Amphibian– The Vertebrates with Dual Life. General Characteristics of Class Amphibians: Some of the general characters of class amphibian are listed below: 1. They are the first cold blooded vertebrates from evolution point of view which came to the land. Class Amphibian includes about 3,000 species. [...]
The following points highlight the two common examples of Cyanobacteria. The examples are: 1. Spirulina and 2. Nostoc. Spirulina: It is a spirally coiled free floating filamentous blue green alga or cyanobacterium of up to 0.5 mm length. The trachoma's appear to be unicellular but staining and electron microscopy has shown the presence of thin transverse walls. The ends are [...]