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.
(1 point) Todayâs protists and plants, fungi, and animals have an ancient common ancestor. Protists evolved from bacteria while the other eukaryotes evolved from archaea. Todayâs protists gave rise to plants, fungi, and animals. Todayâs protists arose from ancient plants, fungi, and animals. 3. To move, nonmotile protists depend on (1 point) air or water currents and other organisms. cytoplasmic projections. cilia and flagella. microtubules. Figure 21-2 4. The organism shown in Figure 21â2 is an example of (1 point) a flagellate. a ciliate. an amoeba. a spore-forming protist. 5. During what process do two protists exchange genetic material?