are you saying that a dolphin or a whale cant smell because they have genes for air scent?
actually human (or at least many land mammals) has many genes that dont exist in amphibian:
Orphan gene - Wikipedia
"Estimates of the percentage of genes which are orphans varies enormously between species and between studies; 10-30% is a commonly cited figure"
actually this kidney (called pronephros) is essential for the development of the adult kidneys:
Pronephros - Wikipedia
"Despite this transient appearance in mammals, the pronephros is essential for the development of the adult kidneys. The duct of the
mesonephros forms the Wolffian duct and ureter of the adult kidney. The embryonic kidney and its derivatives also produces the inductive signals that trigger formation of the adult kidney."
so creation can explain it just fine.
even if its true, the fact that many animals do have new organs prove that they most evolve them somehow. so if they cant evolve them stepwise it means that evolution is wrong. i gave you a simple example like a motion system. even you as intelligent designer cant add a single part to make a motion system for an organ. you need at least several parts to begin with. so such a system cant evolve stepwise.
nahhhh, dolphins smell, but it's smelling through water which use seperate genes, probably more related to taste, though not sure on that. their blowhole/nose has little/no scent ability.
and no creation can't, because there would be no need to do the earlier ones to signal the adult. It's that way because due to it's history to get the adult mamal kidney's it has to go through earlier stages, a creator could just make a functioning kidney in humans and other mamals and such from the start.
It's akin to making a muffler in a modern car, but you have to first build a mostly functioning 1910 version, and the mostly functioning 1940's version, breaking each one up before building the final one, sure you might use parts and 30% or what ever of the previous is in the final, but thats not how a engineer would make things. Again it's akin to using all the parts for a lambergini in a ford truck, just half are welded into place.
Again you ignored what I said and scientists have said about movement, there are many easy ways to imagine it, plus there is no such thing as "the bacterial flagellum" there are dozens of kinds, some more complicated, some les then the example behe used, there are precursor type things such as the type 2 secratory system *think thats the name* I can easily imagine ways of making the flagellum using just the motion of the creature.
Simple things such as.
ameoba that moves by extending it's parts, maybe something akin to the flatworm that uses a ripple to move better, the ripples are more pronounced by ridges or bumps in one, these become more pronounced over time, possibly thinning to be more useful, still going with the ripple type which I think some bacteria still have, then add in the method for these flagellum to move beyond the ripple and so on.
each step has a use, and each next step is better, it doesn't require a huge amount of imagination.
what good is half a flagellum, it's still better then none, as the flagellum improve there is less need for other locamotive means so those disapear, and so on.
It's like the eye, it was once used to try to disprove evolution, except we have shown the step wise means to make the eye that exists now in nature so that went away. It would be interesting to do a long term study on locomotion in bacteria if it's not done yet, and see if we can find a simular set of stages throughout their kingdom.