Final answer:
Yes, Archaea and Eukarya, along with their common ancestor, form a clade. They share several traits that are not found in Bacteria, supporting their close evolutionary relationship.
Step-by-step explanation:
Yes, Archaea and Eukarya, along with their common ancestor, form a clade. A clade is a group of organisms that includes a common ancestor and all of its descendants. Archaea and Eukarya share several traits, such as genes, proteins, and metabolic pathways, that are not found in Bacteria. This suggests that Archaea and Eukarya are closely related and share a more recent common ancestor than Bacteria.