Question

Both Thermococcus and Thermoplasma are unicellular organisms that can live in extreme environments. Based on the concept of domains, what do they have in common? They both belong to domain Archaea. They both belong to kingdom Animalia. They both belong to kingdom Plantae. They both belong to domain Eukarya.

Answer 1

Both of these organisms belong to the Domain Archaea.

Under the new classification system there are 3 domains (Bacteria, Archaea and Eukarya).

Answer 2

They both belong to domain Archaea.

Step-by-step explanation:

Based on the concept of domains, there are only few organisms that can live under extreme environments, let alone organisms that are unicellular organisms, and this is usually located in the domain Archae, because as their name in latin suggest they are archaic organisms that can live in extreme environments.