what is an organism that does not have a nucleus
This is what I learned: Organisms that have a nucleus are called Eukaryotes (pronounced yoo-care-ee-oats). Some examples of eukaryotes are humans and most types of animals, such as zebras or turles. Eukarytoic organisms are animals, plants, fungi, and protists. Organisms that do not have a nucleus and Prokaryotes (pronounced pro-care-ee-oats). Examples of prokaryotes are a type of bacteria (such as Frateuria aurantia) and thermophiles. You can remember which is which by thinking that prokaryotes has an o in the beginning while eukaryotes does not.