In addition to the gills, all other respiratory organs that exist in different fish are called accessory respiratory organs. For adaptation to special environments, these accessory respiratory organs are developed as an additional part of the gills in fish. In most cases, tropical freshwater fish are seen to develop these organs, but this is very … Read more
When fish feed is prepared without following proper procedures and dosages, fish feed is often damaged and poisoned by various types of anti-nutrients and toxins. Plants belong to the family Autotrophs; since they can produce their own food, green plants are called producers. They can synthesize many chemicals from nature, but animals cannot. All these … Read more
Disinfection and sterilization are two terms that are often confused by people because on the surface they would appear to mean the same thing. However, there is a very clear difference between disinfection and sterilization. Properly disinfecting a surface means that it has been thoroughly cleaned of visible dirt, removing any remaining bacteria with a … Read more
Brown shrike(Lanius cristatus) is a passerine migratory bird of Bangladesh which belongs to the family Laniidae under order Passeriformes of class Aves. They are also known as also known as “butcher birds” due to their feeding habits. They are found in grassy areas along the hills of Bangladesh, in forests and even in scattered bushes. Systematic … Read more
The watercock (Gallicrex cinerea) is a passerine bird which belongs to the family Rallidae under order Passeriformes of Class Aves. They are found in swamps across south Asia from India and Sri Lanka to south China, Japan and Indonesia. They roam in places where there is a lot of water. They are found in paddy … Read more
Fish is a primitive jawed vertebrate animal (Phylum: Chordata). They are cool-blooded aquatic animals that breathe and move with the help of fins. Fish originated in the Ordovician period and spread in the Devonian period. That is why Devonian is called the golden age of fish. The study of fish is called Ichthyology. Fish are … Read more