I have some trees generated by RAxML. All of them share this common property: bifurcating in all (internal) nodes except one node which is trifurcating and has at least a child that is a leaf. For example:
I'd like to use these trees as input to some supertree program that only accepts binary trees. So now I have some questions:
1- Are these trees considered "Unrooted Binary" or "Rooted Non-Binary"?
2- What is the reason behind the above shared property? (I am CS major, sorry if this is a stupid question)
3- What would you recommend for making them binary? (I am thinking of multi2di(phy,random=TRUE) function from ape, but I'm wondering if the answer to 2nd question would question this method)