Final answer:
Eukaryotic and prokaryotic cells are the two types of cells that make up all living things on Earth. Eukaryotic cells, such as those in the human body, have a nucleus that is enclosed by a membrane. Prokaryotic cells, like bacteria, do not have a nucleus.
Step-by-step explanation:
Eukaryotic and prokaryotic cells are the two types of cells that make up all living things on Earth. Eukaryotic cells, such as those in the human body, have a nucleus that is enclosed by a membrane. Prokaryotic cells, like bacteria, do not have a nucleus. Instead, their DNA floats around inside the cell.