Evolution doesn't have a direction so surely it is possible for it to go backwards
You have sort of answered your own question except there is no forward or backward. In some senses it would appear that the evolution is directional but the traits only appear when such traits are positive to the species otherwise the trait is usually lost or significantly reduced. One example of such is the excretion of Nitrogeneous wastes among vertebrates. Bony Fish by ammonia, cartiligeous fish by urea, Amphibians start with ammonia then as adults by urea, reptiles & birds start as ammonia , go to urea and finally while still in the embryonic stage to uric acid, this is the same for the monotreme mammals but the placentals revert back to urea.
Although there is some uric acid formed, it is a very small amount and all placentals except the anthropoid apes (monkeys, apes to include humans), convert the uric acid to allantoin but the anthropoids don't. Since there is no way for the kidneys to excrete uric acid, it would seem that it is a regression for the anthropoids to not convert the uric acid to allantoin.
There is no better love between 2 people than mutual respect for each other WT Young, 2002
Who gave anyone the authority to call me an authority on anything. WT Young, 1969
Since Evolution is only ~90% correct it should be thrown out and replaced by Creation which has even a lower % of correctness. W T Young, 2008
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