The techniques of DNA diagnosis have found application in a quite different areas. This is important in areas as diverse as identifying cell culture, determining family relationships, in studies of animal behaviour, immigration problem, to identify criminals or murderer, disputed paternity and in forensic medicine. The most accurate method of identification technique based on recombinant [...]
The primary aim of a taxonomist must be the construction of classes of living things about which scientifically useful inductive generalisations can be made. Many workers have enumerated various aims and tasks of a taxonomists. For the sake of convenience to readers, there are summarised below. 1. To catalogue the diversity of life on earth [...]
It is now well-known that taxonomy of a given group passes through several stages. These stages are referred to as alpha (analytical phase), beta (synthetic phase), and gamma (biological phase) taxonomy. Alpha taxonomy is the level at which the species are characterised and named; beta taxonomy refers to the arrangement of the species into a [...]
The word taxonomy is derived from the Greek words taxis (= arrangement) and numos (=law). It was first coined by A.P. de Candolle, a Professor of Montpellier University in France, in his Botany treatise in 1813, as a French Word “Taxononomie”, evidently formed on the analogue of astronomie, economie, agronomie and other similar words. The [...]
1. What do you mean by climatic background to human evolution? Ans. Towards the end of the Miocene, between seven to five million years ago, an abrupt drop in global temperature coincided with the formation of the West Antarctic ice sheet, Sea levels fell, the tropical belt shrank residing widespread extinctions of primates throughout Eurasia. [...]
The term is used to describe the growth and accumulation of living organisms on the surfaces of submerged artificial structures as opposed to natural surfaces. It results in increased costs of recovery of normal functioning of man made structures such as ships, buoys, floats, pipes, cables etc. Biofouling may be of two types- Microfouling- microorganisms [...]
Organic matter produced within an ecosystem is known as autochthonous material. Organic matter entering a stream, lake or ocean but derived from an adjacent terrestrial ecosystem is identified as allchthonous material.
A term with alternative definitions, not all of them synonymous. To state two (i) the ‘occupation’ of ‘profession’ of an organism or species, or (ii) the range of conditions, resource levels and densities of other species allowing the survival, growth and reproduction of an organism or species. Hence, if each condition, resource or other species [...]
1. What is blood Grouping? Why the determination of blood group is important? Ans. Agglutination of blood cells depends on the reaction of Agglutinogen and Agglutinin present in the blood. Grouping of human blood can on the basis of the Agglutinogen and Agglutinin into different of categories is known as blood group. It is important [...]
The main functions of mitochondria are: Cellular respiration and production of ATP through TCA cycle. It is therefore, called as the power-house of the cell. Synthesis of Lecithin and Phosphatidyl Ethanal Amines with the aid of Fat synthesizing enzymes. Regulates Fatty Acid metabolism. Aids in Yolk formation in the developing ova. Storage of different ions.
Dr. Amlan Kumar Mitra, Biology Guide Since 2009
