00:01
So here we are going to see a question which says in the oceans on either side of the isthmus of panama are 30 species of snapping stem, 15 species on the pacific side and 15 different species on the atlantic side.
00:16
The species live at different water depths.
00:18
Morphological and genetic data show that the atlantic and pacific species that live in similar depths are sister species.
00:26
Geological evidence indicate that the isthmus of panama started rising about 10 million years ago.
00:31
And the oceans were completely separated by the isthmus about three million years ago today the isthmus represents the isthamas the isthamas represent sympathetic speciation gametic isolation reproductive isolation and allopathic speciation so moving ahead with the answer we see moving ahead with the answer we firstly see the introduction part and that is speciation, that is speciation.
01:08
Spaciation is the formation of new species due to some of the evolutionary forces.
01:31
Due to some of the evolutionary forces.
01:38
Some of the evolutionary forces, evolutionary forces.
01:48
So move, so moving ahead with the explanation of the answer, moving ahead with the explanation of the answer, we see that out of four options, we have to choose which, which particular is, which particular, which particular, which particular evolution mechanism is responsible so firstly we will see the correct answer of this question is allopatric speciation is alopatric aloe patric is apaceation because, because in such speciation, in such speciation, in such speciation, barrier is present...