admin 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
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
Scoliodon is an Indo-Pacific species which belongs to the family Ceacharrhinidae under order Carcharhiniformes of Class Elasmmobranchii(=Chondrichthyes). It has an elongated and spindle-shaped body which tappers at the end. The head is dorso-ventrally compressed with laterally compressed trunk and tail. The mouth is situated on the ventral side and the entire body is covered by … Read more
Every living thing consumes food for maintaining its life or for conducting physiological functions like body growth, movement and reproduction. An organism collects the necessary food from its surroundings. This food is used directly or is used by the body in the form of simple products. Digestion is the process by which the body turns … Read more