What beliefs would we consider reasonable for a self proclaimed Christian to hold?

[drfuzzy]

OFC not..and, conveniently, we didn't..so what's the problem?  

All descendants of mayflies will always be mayflies, no matter what else they become.  Just as all descendants of eukarya are eukaryotic, all animalia are animals, all chordata possess notochords, all vertebrata have spines, all mammalia are mammals, all primatae are primates, all hominidae are hominids, so on and so forth.

Whatever our children may one day become.."homo sapiens" will appear in their full classification.

So you believe that plants have always been plants, reptiles have always been reptiles,, and mammals have always been mammals etc?

Don't you know how to use Google?  
Plants evolved from a single type of green algae.  Good info on plants     Mammals evolved from a group of reptiles called the synapsids between 275 to 310 million years ago.  Wait around 300 million years, (if we don't destroy our planet and each other) and humans might be something different, if we merge with technology or have to adapt to a different planet . . . who knows . . . but the base will be homo sapiens.