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.
protists are the 'leftover' organisms that cannot be determined if they belong to the other kingdoms. They might be unicellular, some form colonies, some are pseudopods such as ameba, and some could cause malaria when introduced by the mosquito.They evolved from the archae bacteria since they're more closely related.rotist are grouped into 3 main groups they are used in things such as food and toothpaste protists almost wiped out the French wine industry. Protists are the eukaryotic orga â¦ nisms that doesn't fit into any other kingdoms.