The construction of phylogenetic trees is a mapping out the proposed divisions and common ancestors of all living species. Traditionally, these trees have been built using morphological data, such as appearance and embryology. Recently, it has been possible to construct these trees using molecular data. Phylogenetic trees based on different types of information agree with each: that there is strong evidence of a real underlying common descent.

This phylogenic tree is composed based on molecular data (rRNA). What statements can we infer are true about the organisms throughout the tree?

1. Because the tree is rooted, all branches share a common ancestor.
2. All organisms have some sort of cellular structure/organization.
3. All Eukaryotes evolved from Bacteria.
4. Since the organisms contain RNA, they share the same DNA.
5. If the organisms contain RNA, the share the same four nitrogen bases.

Phylogenic tree is composed based on molecular data (rRNA) the statement that - Because the tree is rooted, all branches share a common ancestor-is True

Explanation:

From the question we can interpretate that  phylogenetic tree shows the evolutionary relationship between organisms.

A phylogenic  tree or called a evolutionary tree is a branching diagram or "tree" that shows evolutionary relationships between various biological species based upon similarities and differences in their physical or genetic characteristics. 

Given that rRNA data were used, then only expressed characteristics (genes) have been considered. Two organisms in different branches with a common origin, have a common ancestor.The  branches length may depend or not on evolutionary time, depends on the used algorithm

Phylogenic tree is composed based on molecular data (rRNA) the statement that - Because the tree is rooted, all branches share a common ancestor-is True

the most logical answer would be a

b - the respond is innate and varies over time.

good luck!