All living things are made of one or more cells, and those cells are either eukaryotic or prokaryotic. You, like all animals as well as plants and fungi, have eukaryotic cells. That means your cells have a nucleus. Inside that nucleus, genetic material (DNA) is coiled into thread-like chromosomes. Organisms with eukaryotic cells are called eukaryotes. Prokaryotic cells, on the other hand, are more simple. They lack specialized, membrane-bound organelles, like mitochondria, and they do not have a nucleus. Their genetic material is usually in a loop that floats in the cytoplasm. That loop is called the nucleoid. Prokaryotic cells are much smaller than eukaryotic cells. All bacteria are unicellular, made of just one cell, and they are prokaryotes. Some bacteria have flagella, tail-like structures on the end that help them to move. How are bacteria cells different from human cells?

A
Bacteria cells do not contain a cytoplasm.

B
Bacteria cells do not contain genetic material.

C
Bacteria cells are much bigger than human cells.

D
Bacteria cells are less complex than human cells.