no because dolphins and dogs are in the same class whereas salmon and dolphinas are in different classes. animals in the same class share more of the same characteristics.
habitat isnt even a characteristic
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i think, that because that second one has a long tail, it would have been able to swim. i believe it's more likely to have swam than flown.
you're saying the arms on the second are simalar to the massive wings of the last? that the wings on the first look smaller than the arms of the second?
because of one missing wishbone and a tiny little extra bone it's not possible to be a bird?
but a huge tail (many, many bones) and no wings it is more likely to be bird like?
http://ncse.com/evolution/science/what-is-homology this might b extremely useful for u trix
that thumb is enormous. its as long as the pterosaurs limb.
also ur missing the fact that one is quadrapedal and the other is bipedal.
and the way they stood is very different. the way they flew is also very different. a T-Rexs skeleton is structured more like a birds