Tree rings at Creation- It could easily go both ways without any problem for the theist. Just by creating a planet, you create the “appearance” of age.
Lets say God created tress that are all already of fruit bearing age…I see no reason why they could not have rings representative of their would be age. Or He could have created them with one giant ring, representative of their actual age. Either is possible for God I think. I will see if there is any info on the web on this.
Here’s a must read article on it: http://www.apologeticspress.org/APPu…7&article=1700
Belly Buttons- I am sure Adam and Eve had no bellybutton, only their children onward would show such a feature.