How could two species that evolved on separate continents have many similarities? read more > >

Two species having similar types of characteristics can be possible and it is proved by the concept of continental drift.                                                

The continental drift refers to the movement of the continents with respect to the poles but it was unable to explain the mechanism behind this continental motion. Later on, this continental drift was modified to a new theory that was universally accepted. This is known as the plate tectonic theory.

According to this theory, the lithospheric plates move over the less dense layer of the asthenosphere due to the generation of convection current in the mantle. It is possible due to the heat provided by the interior of the earth.

So from this theory, it is understandable that initially, a large supercontinent named Pangea existed which was comprised of various species of organisms. But later on due to the plate motion, the continents were separated from one another and the organisms also eventually got split.  

These organisms over a due course of time got evolved but still found to contain similar old characteristics. This is how two species that are currently found in different continents can show similar characteristics.

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