Geographic speciation, Biology

In almost all animal groups, the mode of speciation is geographic speciation. It is essential that a population which is a prospective new species is geographically isolated from the parental species. Geographical isolation, according to Ernst Mayr, is almost invariably necessary for speciation to occur. Geographic speciation, as we pointed out earlier, in turn can be typed into two categories:

Allopatric Speciation

Speciation by populations of parent species which occupy quite separate territories is the most common mode of species formation among animals. Allopatric speciation occurs in large continental areas, and perhaps, also in the vast continental slopes and ocean floors. A once continuous series of population may be divided into two parts hy a new barrier. The barrier may be a newly formed desert or river or mountain range. The population on other side of new barrier becomes geographically isolated.

Posted Date: 4/5/2013 5:29:14 AM | Location : United States







Related Discussions:- Geographic speciation, Assignment Help, Ask Question on Geographic speciation, Get Answer, Expert's Help, Geographic speciation Discussions

Write discussion on Geographic speciation
Your posts are moderated
Related Questions
Q. SARS is a disease that appeared in 2003 with epidemic features in the province of Guangdong, in east China. What kind of agent causes SARS? SARS is caused by a virus from th

Why can the amnion also be considered an adaptation to terrestrial life? The amnion is also an adaptation to dry land since one of its functions is to prevent desiccation of th

Which is the autotrophic group responsible for the production of most part of the molecular oxygen of earth? Cyanobacteria and Algae of the phytoplankton are the organisms that

Q. How dissimilar are the location of ribosomes in eukaryotic and in prokaryotic cells? In eukaryotic cells they can also be found free in cytoplasm and mainly adhered to the e

According to their functions how can nutrients are classified? One possible and utile functional classification for nutrients is the one that divides them into energetic, struc

Q. Discuss in brief distant and contact osteogenesis? Three terms are used to describe individual aspects of bone formation process that occur at implants. They are Osteocondu

DEMOGRAPH Y - Scientific study of vital & social statistics such as births, deaths, disease etc. of human population is called demography. It deals with - 1.      Change

describe five features of chromosomes used in cytogenetic analysis?

How plants control the opening and the closing of the stomata? The closing and the opening of the stomata depend upon the necessity of the plant to lose water and heat through

describe and compare reproduction in all the kingdoms except kingdom animalia