A virus is an infectious biological agent of small size. The name ‘Virus’ comes from the Latin word meaning ‘poison’ or ‘slimy liquid’. The size of the viruses ranges from 20-300 nm. The chemical composition of all true viruses is nucleic acid either DNA or RNA and protein. They cannot multiply and continue the … Read more
Bacteria (singular-bacterium) are the microscopic unicellular and prokaryotic organisms. It is also known as a microbe. The term bacteria were first coined by F.J. Cohn in 1854. Bacteria come from the Greek word manning rod. It was discovered by Antonie Von Leeuwenhoek in 1976. It has a plant like cell-wall and autotrophic mode of nutrition. … Read more
The word ‘vitamin’ (Latin, vita, life+ amine) is derived from the original word “vitamine”, coined by Casimir Funk in 1912. Vitamin is an organic compound which is found in the food in variable and minute quantity and must be supplied to the animal organism from the external sources. It is a vital nutrient for an … Read more
The Cardinal tetra is the most well-known and charming aquarium fish among the freshwater pet fish keepers due to its toughness and magnificent body coloration which is also called the Red Neon Tetra. It is an Actinopterygian ray-finned fish under Characidae family of order Characiformes. This Characin (Paracheirodon axelrodi) was first exposed by Schultz (A … Read more
The bumblebee catfish is well known aquarium fish among the pet fish keepers. It is also referred to as the South American Bumblebee Catfish. It is a bottom dwelling fish which was first described by Carl Henry Eigenmann in 1912. This fish belongs to Pseudopimelodidae family under Order Siluriformes of Class Actinopterygii (=Osteichthyes). Systematic Position … Read more
The Jaguar Cichlid is a very popular and good-looking aquarium fish. It’s gorgeous body decoration and coloration makes the fish more acceptable among the freshwater pet fish keepers. This fish (Parachromis managuensis) was first explained by a popular Ichthyologist Albert Karl Ludwig Gotthilf Günther in 1867. It is a perch like ray-finned fish which is … Read more