Which corresponds to the most recent common ancestor on a phylogenetic tree?

The answer is - The Root Node

Explanation:

The Phylogenetic tree shows the relationship between different organisms and their path of evolution through time. It is a graphical representation that links organisms from a common ancestor down to their different descendants. The most recent common ancestor of all the taxa or organisms on a phylogenetic tree is represented by a root node as it is the very first parent or node.

the answer to your question is,

d. when a child was born.

-mabel < 3

the chair is the committee member from the majority party who has the most seniority. in the south carolina senate, the chair is the committee member from the majority party who has the most committee seniority.