Domain:

Kingdom:

• Eukaryote

• Autotroph

• Simple

organization

Domain is Eukaryota and kingdom is Protista.

Explanation:

According to Carl Woose, the 3 kingdom classification came into limelight in taxonomy. The three kingdoms are Archae, Anarchae and Eukaryota. The 1st one contains archaebacteria, second one contains bacteria and blue green algae, while third contains all the eukaryotic organisms.

The domain Eukaryota contains several kingdoms like-Protista, Fungi, Plantae and Animalia.

According to the characters given in the question, the organism is an eukaryotic organism. So domain must be Eukaryota. Now the organism is autotroph, so kingdom can be Protista or Plantae. But members of kingdom Plantae are complex. So the organism is belonging to Kingdom Protista. They may be an euglenoid.