In this article we will discuss about the histological peculiarities of various organs. The various organs whose histological peculiarities has been discussed are: 1. Tongue 2. Spleen 3. Pancreas 4. Lung 5. Kidney 6. Adrenal 7. Testis 8. Ovary 9. Artery 10. Vein 11. Thyroid 12. Liver 13. Gastro-Intestinal Tract 14. Stomach 15. Small Intestine. 1. Tongue: Epithelium is of [...]
The following points highlight the four important species concept. The important species concept are: 1. Typological or Essentialist Species Concept 2. Nominalistic Species Concept 3. Biological Species Concept 4. Evolutionary Species Concept. 1. Typological Species Concept: According to this concept, there are a number of diversities on the surface of the earth that exist as a limited number of universals [...]
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 [...]