The three leaching methods used for extraction of minerals from ores - Slope leaching - finally ground ores are ditched in huge piles down a... View Article
Cells showing meiosis are called meiocytes. It can occur in - In diploid organisms, meiosis takes place during the formation of gametes or... View Article
Karyotypes are of two types - symmetrical karyotype and asymmetrical karyotype. A symmetrical karyotype has all metacentric chromosomes of the... View Article
The primary cell wall is the cell wall that is formed first that is produced inside the middle lamella. This primary wall is generally thin (1- 3... View Article
Earthworms play a role in improving soil fertility as given below - They make the soil porous by burrowing into it. Porous soil enables better... View Article
Some common poultry diseases are - Name of disease Causative Respiratory mycoplasmosis It is a contagious disease caused by Pleuropneumonia... View Article
Culturing a few selected species of fishes together in proper propositions in a pond to increase the total production of fishes is called... View Article
The pupa or chrysalis is a non-motile and non-feeding stage that occurs in the cocoon. It can be seen by cutting open the cocoon. The body of a... View Article
Difference between male and female silk moth - Attributes Male silkmoth Female silkmoth Size Small Comparatively large Colour Darker Pale... View Article
The process of removing the silk thread from the boiled cocoons is called reeling. After removing the loose strands by a revolving brush, free... View Article
Silk must be procured from the cocoons before the emergence of the silkmoth. Therefore, the pupae are killed by subjecting the cocoons to dry... View Article
The suboesophageal ganglion is found below the oesophagus, which is posterior to the brain. It also takes shape by the union of three pairs of... View Article
The midgut or mesenteron is the second part of the alimentary canal. It is endodermal in origin. It is in the form of a short marrow tube that is... View Article
A pair of jointed legs are present on the ventral side of each thoracic segment. They are adapted for walking and running. Each leg consists of... View Article
Wings are an expansion of the cuticle supported by a network of chitinous ridges called nervures. The first pair of wings are opaque, brownish,... View Article
The head which is normally held at right angles to the long axis of the body is pear-shaped with the narrow end turned downwards and the broad... View Article
Vertebrates are called craniates. Vertebrates include complex chordates, which have a brain and a brain box. The notochord, is wholly or... View Article
Hemichordates are comparatively low-organized animals. They remain strange in terms of their relationship. It is doubtful whether the gill slits,... View Article
Annelids are the first group of non-chordates that show cephalization. Union of a few of the anterior body segments to form a head which is... View Article
