The organisms that do not have a defined nucleus or organelles are classified in to__________ Kingdom.

Explanation:

Organisms that do not have a true nucleus or membrane-bound organelles are called prokaryotes. In the five-kingdom classification, all prokaryotic organisms are placed in the Monera kingdom.

Other options:

• Fungi – Eukaryotic organisms with a true nucleus.
• Protista – Eukaryotic, mostly unicellular organisms.
• Plantae – Multicellular eukaryotic plants with a true nucleus.

Correct Answer: Monera / मोनेरा