In this article we will discuss about the interaction between different species. In the great web of life, which exists in nature, living organisms not only live in an environment, but are also themselves a part of the dynamic environment for other organisms. The relationship between one species and another within a community has evolved through their interactions, based on [...]
In this article we will discuss about the Introduction and Present Status of Genetic Evolution of Species. Introduction to Genetic Evolution of Species: The concept of 'organic evolution' envisages that all the living forms of today developed from a common ancestor. That is, the various life forms are related by descent, which accounts for the similarities among them. The idea [...]
In this article we will discuss about the modes and mechanisms of origin of species. Modes of Origin of Species: The main modes of speciation are: 1. Sympatric speciation: This is the origin of species without geographic isolation. Sympatric species originate by instantaneous development of isolating mechanisms within a deme. Once reproductive isolation is established each population follows its own [...]