Write A Note On Phyletic Lineage In Biological Organization?


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Phyletic lineage
If you look at the biodiversity (the number and variety of species in a place), you find that there are nearly 2.5 million species of organisms, currently known to science. More than half of these are insects (53.1%) and another 17.6% are vascular plants. Animals other than insects are 19.9% and 9.4% are fungi, algae, protozoa and various prokaryotes.
This list is far from being complete. Various careful estimates put the total number of species varies from 5 to 30 million. Out of these, only 2.5 million species have been identified so far.
The present day life has come into existence through phyletic lineages or evolving populations of the organisms living in the remote past. Evolutionary change often produces new species and then increases biodiversity. A phyletic lineage is an unbroken series of species arranged in ancestor to descendants sequence with each later species having evolved from one that immediately proceeded. If we had a complete record of the history of life on this planet, every lineage would extend back in time to the common origin of all early life.

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