1. we dont know how Adam looked.
We know that Adam was created in the image of God. When Jesus was on Earth, he looked like a man. He says, "He who hath seen Me, hath seen the Father." So, in other words, God looks like man and man looks like God. Hope that helps!!
The End.
2. Common ancestry is not denied as Adam was first human which would have been first of the family "homo." Genetically different enough from the common ancestor which is a theory - unless this has remained a hypothesis.
3. the word Adam means man, which there is a very real metephorical meaning in creation story that depicts more than literal meaning as this is the beginiing of the entire race.
4. evolution relates to the human origion: "I made you from clay." By which we were formed into man - that is a process
5. clay aslo depicts atoms.
And elements and minerals, etc.
Michael