Question

An organism does not have a well defined nucleus and organelles . States its kingdom

Answer 1

There are 5 major kingdoms in which living organisms are divided into. 

4 of these 5 kingdoms are for the Eukaryotic cells that posses Nuclei and Membrane bound organelles which are

1. Protista

2. Fungi

3. Plantae

4. Animalia

Last remaining 5 kingdom is for the prokaryotic cells that does not possess nuclei and lacks membrane bound organelles which is

Monera. 

Thus your answer is Monera. 

Answer 2

It is the kingdom monera in which there is no defined nucleus and orgenells .
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