Question

what is paraphyletic group​

Answer 1

Answer:

Explanation:

Phylogenetics is a branch of biology that deals with studying and determining the evolutionary relationships, or patterns of descent, of groups of organisms. There are three types of phylogenetic groups:

Monophyletic group: contains an ancestor and all of its descendants

Paraphyletic group: contains an ancestor but only some of its descendants

Polyphyletic group: contains various organisms with no recent common ancestor

We will focus mainly on paraphyletic groups for the rest of this lesson. A paraphyletic group is kind of like a group that consists of your parents and your siblings but not you. Your parents are the ancestors of the group, and the descendants are you and your siblings. If you or any one of your brothers or sisters were left out of the group, it would be paraphyletic because it includes ancestors and only some of the descendants. In phylogenetics, however, the term paraphyletic (or monophyletic or polyphyletic) is usually used when describing a group of species and their evolutionary ancestors and not just a small family unit.

Answer 2

• In taxonomy, a group is paraphyletic if it consists of the group's last common ancestor and all descendants of that ancestor excluding a few—typically only one or two—monophyletic subgroups.
• The group is said to be paraphyletic with respect to the excluded subgroups.