User:Przygodzki.1/sandbox

https://en.wikipedia.org/wiki/Chondrichthyes#Evolution

Edits
The grammar needs to be fixed in the evolution section.

I would also add something about the jaw development in sharks

Mention elephant shark because it's a very close relative and it's genome is very important for research today.

Elephant sharks genome pertains to the evolution of Gnathostomes Venkatesh, B, A.P Lee, V Ravi, M.M Lian, Z.W Lim, B.-H Tay, S Tohari, A Tay, S Brenner, A.K Maurya, P.W Ingham, J.B Swann, T Boehm, Y Ohta, M.F Flajnik, Y Sutoh, M Kasahara, S Hoon, V Gangu, K.W Kong, S Ho, S.W Roy, M Irimia, V Korzh, I Kondrychyn, B Lorente-Galdos, J Quilez, T Marques-Bonet, B.J Raney, L.W Hillier, P Minx, R.K Wilson, and W.C Warren. "Elephant Shark Genome Provides Unique Insights into Gnathostome Evolution." Nature. 505.7482 (2014): 174-179. Print.