The smallest organisms are found in Kingdom Monera or the Moneran Kingdom.
The kingdom that contains the smallest organisms is the Monera kingdom, which includes bacteria and archaea. These organisms are unicellular and have simple cellular structures compared to other kingdoms.
I believe nanobes(of the microorganism family) are the smallest known living organisms at a size of (20 nm = .02 microns) being the smallest.
Organisms made of prokaryotic cells are found in the Kingdom Monera.
A cell without a distinct nucleus is in the kingdom Prokaryota. Other cells (Eukaryota) are in either the Animal or Plant kingdom
Pipistrelle
plantea
Phototrophic organisms are found in the Kingdom Protista, specifically in the subgroups of algae and some protists. These organisms use light to produce energy through photosynthesis.
The smallest microbes in the protist kingdom are generally considered to be the marine algae known as picoplankton. These are single-celled organisms that are just a few micrometers in size. They play a significant role in the marine ecosystem as primary producers.
Kingdom Plantae
The organisms found in the kingdom Animalia are multicellular, heterotrophic organisms that lack cell walls. They exhibit diverse characteristics and behaviors, ranging from simple sponges to complex mammals.
eubacteria is the smallest kingdom
Antibiotic designed to kill single-celled prokaryotic organisms found in food by disabling their ability to use oxygen and suffocating them is most likely targeting organisms found in the Eubacteria kingdom.