The evidence from science shows that only microevolution (variations within a biological "kind" such as the varieties of dogs, cats, horses, cows, etc.) is possible but not macroevolution (variations across biological "kinds", especially from simpler kinds to more complex ones). The only evolution that occurs in Nature is microevolution (or horizontal evolution) but not macroevolution (vertical evolution).
The genetic ability for microevolution exists in Nature but not the genetic ability for macroevolution. The genes (chemical and genetic instructions or programs) for microevolution exist in every species but not the genes for macroevolution. Unless Nature has the intelligence and ability to perform genetic engineering (to construct entirely new genes and not just to produce variations and new combinations of already existing genes) then macroevolution will never be possible in Nature.
[If] a woman were to lose a finger it would not result in her baby being born with a missing finger. Similarly, even if an ape ever learned to walk upright, it could not pass this characteristic on to its descendants. Thus, modern biology has disproved the once-held theory that acquired characteristics from the environment can be transmitted into the genetic code of offspring.
It has been said that the eye of an octopus is more similar to the human eye than any other animal.
Yes, there are many genetic and biological similarities between species, but are these similarities because of common biological ancestry (macroevolution) or because of a common Designer who designed similar functions for similar purposes in all of the various forms of life on earth from the simplest to the most complex. Neither position can be scientifically proved.
Dogs must breathe the same air as humans. The creationists, therefore, believe that the Creator designed similar lungs for both dogs and humans. The evolutionists believe that dogs and humans have similar lungs because they are related from millions of years ago.