Question

What is a monophyletic group of organisms?

1) Groups that include the common ancestor and all descendants of that common ancestor.
2) Groups that include the common ancestor and only one of many descendants of that common ancestor.
3) Groups that include several lineages that do not share an immediate common ancestor.
4) Group that includes the common ancestor plus some but not all descendants of that common ancestor.

Answer 1

A monophyletic group is a group of organisms that includes the common ancestor and all of its descendants. It is represented by a single point on a phylogenetic tree, showing the evolutionary relationships between organisms.

Step-by-step explanation:

A monophyletic group is a group of organisms that includes the common ancestor and all of its descendants. It is represented by a single point on a phylogenetic tree, showing the evolutionary relationships between organisms. Clades are examples of monophyletic groups, where all organisms in the clade stem from a single point on the tree. Non-clade groups, on the other hand, show branches that do not share a single point.