Life on earth wouldn't work without bacteria. I wouldn't presume that there is no bacteria in heaven. But it will no longer be hostile to us.
It's good to have a little imagination.
You mentioned the ecology of our natural world (which involves decomposition fertilizing new life) and also our digestion (which involves bacteria breaking down food, another form of death and decomposition), but heaven does not work like this and there will be no death (and therefore, no decomposition or rotting). This is no problem since
"the city has no need for sun or moon to shine on it, because the glory of God illuminates the city, and the Lamb is its lamp."
So we should not expect nature to work in the same way in heaven since it is not "nature" at all, but the supernatural world of heaven.
I do affirm that we will retain our personal identities and memories in heaven and thus we will still be male and female, just as Jesus is still male in heaven. We will remember our wives and children and even worship God together and know that we were spouses or parents on earth. We are not hit by a heavenly amnesia. While Adam and Eve started out naked and not ashamed, I think we will have glorified bodies and be clothes in white robes or clothes of some kind. We will retain our physical features.
Of course, I am not sure how this works for ugly people, since I don't think ugliness will be in heaven. And yet we will be the same people in heaven and identifiable.