Why a mastectomy may be necessary. A mastectomy is mainly used as a treatment for breast cancer or to reduce the risk of breast cancer developing. Although breast cancer in men is much rarer than female breast cancer, it can also be treated with a mastectomy. Treating breast cancer.
Bacteria. The Bacteria are considered as unicellular prokaryotic organisms. Unlike eukaryotes, bacteria cells lack an organized nucleus, mitochondria, chloroplasts and other membrane bounded organelles. Bacterial cell has only a circular DNA, which does not associate with histone protein.Bacteria do not show sexual reproduction methods.nlike eukaryotes, bacteria cells lack an organized nucleus, mitochondria, chloroplasts and other membrane bounded organelles. Bacterial cell has only a circular DNA, which does not associate with histone protein. Bacteria do not show sexual reproduction methods.
ANd bacteria don't! Thats what makes them different. Also Archaea bacteria live in extremem condtions that normal bacteria can't. This is why they are seperated Eukaryotes are in the same domain because they have a nucleus, this makes them much more complex then bacteria.lso Archaea bacteria live in extremem condtions that normal bacteria can't. This is why they are seperated Eukaryotes are in the same domain because they have a nucleus, this makes them much more complex then bacteria.