Question

An ancestor and all of its descendants are known as a monophyletic group or a(n) ________.

1) clade

2) plesiomorphy

3) synapomorphy

4) apomorphy

Answer 1

A monophyletic group, or clade, is a group of organisms that includes an ancestor and all of its descendants. It is a phylogenetic classification based on evolutionary relationships.

Step-by-step explanation:

A monophyletic group, also known as a clade, is a group of organisms that includes an ancestor and all of its descendants. It is a phylogenetic classification based on evolutionary relationships. Clades can vary in size, but the important factor is that all organisms in the clade stem from a single point on the phylogenetic tree.