Yes, and they have very soft bark.
There both trees, but a holy tree probably is a scacred tree and a yew tree is very rare to find throughout runescape
The Tree of Knowledge existed as an actual (physical) tree in the Garden of Eden Genesis 2:9 - And out of the ground the Lord God made every tree grow that is pleasant to the sight and good for food....
The Beech tree is the odd one out as the rest are conifers.
No it is artificial, The tree would be really hard to maintain if it was real