. State and describe in brief any three main factors responsible for the rise
State and describe in brief any three main factors responsible for the rise of a new species
The process by which new species develop from the existing species is known as speciation.
Important factors which could lead to the formation of a new species are as follows:
• Genetic drift caused by drastic changes in the frequencies of particular genes by chance alone.
• Geographical isolation of a population caused by various types of barriers like mountain ranges, river, sea etc. The geographical isolation leads to reproductive isolation due to which there is no flow of genes between separated groups of population.
• Sometimes the sub-population becomes reproductively isolated by ecological barriers. Therefore it occurs
within the same geographical area and within the original population