Which domain contains all organisms that have a nucleus?

• A. Archaea
• B. Prokarya
• C. Bacteria
• D. Eukarya

Answer: (D)

Verified step by step guidance

1. Understand the basic classification of life into three domains: Archaea, Bacteria, and Eukarya.
2. Recognize that the presence of a nucleus is a defining characteristic of eukaryotic cells.
3. Recall that prokaryotic cells, which include organisms in the domains Archaea and Bacteria, do not have a nucleus.
4. Identify that the domain Eukarya includes all organisms with eukaryotic cells, which have a true nucleus.
5. Conclude that the domain containing all organisms with a nucleus is Eukarya.