In this article we will discuss about the meaning and mechanisms of isolation of species. Meaning of Isolation: The first step in the development of a new species is isolation. A population should split up into two or more separate demes each with its own gene pool. These demes must be isolated from one another. If genes are exchanged between [...]
The following points highlight the three main concepts of species. The concepts are: 1. Morphological Species Concept 2. Genetic Species Concept 3. Biological Species Concept. 1. Morphological Species Concept: This is the traditional concept of species. It was originally introduced by Carolus Linnaeus in his Systema Naturae in 1758. According to this concept, a population group of morphologically distinct organisms [...]
In this article we will discuss about Species:- 1. Concept of Species 2. Types of Species 3. Intraspecific Categories. Concept of Species: Linnaeus (1735) conceived "species" as a unchangeable unit. This monotypic or static concept prevailed till the 19th century. The system of classification followed by Linnaeus is an artificial system. While defining a species only the morphological characters were [...]