The series of specimens in the fossil record. The variability in populations. The morphological similarity of related species within genera. The nested hierarchy of living organisms repeated in fossils.<quoted text>
<quoted text> response to fossils are not transitional forms.
All of them are. Everything alive or once was alive is transitional.
This is just an assertion, there is no scientific evidence that proves this. Saying everything is transitional is your way of saying we haven't seen any kind produce another kind so we will assume it.
A single fossil, yes. A sequence of fossils can tell us quite a bit about ancestors and descendants.
You can not establish that any fossil was the ancestor of another even if you could extract DNA from them (which may be possible now we have soft tissue)
We don't have to establish a direct link as in they are grandpa and grandson. You don't need that kind of resolution to establish lineages.
You read about soft tissue and now that is the current fundie holy grail.