who are their predators?
Organisms such as "Myxococcus xanthus"
Bacteria
These include organisms such as "Myxococcus xanthus", which forms swarms of cells that kill and digest any bacteria they encounter. 
what bacterial parts are vital to a bacterium Prokaryotic microorganisms what do you mean by bacteria? They are a type of biological cell. describe their intracellular structures? It is surrounded by a cell membrane which encloses the contents of the cell and acts as a barrier to hold nutrients, proteins and other essential components of the cytoplasm. and extracellular? Around the outside of the cell membrane is the cell wall. Bacterial cell walls are made of peptidoglycan (also called murein), which is made from polysaccharide chains cross-linked by peptides containing D-amino acids. what are their origins? The ancestors of modern bacteria were unicellular microorganisms that were the first forms of life to appear on Earth, about 4 billion years ago. how about their metabolism? It exhibit an extremely wide variety of metabolic types which is classified into nutritional groups on the basis of three major criteria. how do they reproduce? It reproduces through binary fission, a form of asexual reproduction. are they able to communicate? This bioluminescence often occurs in bacteria that live in association with fish, and the light probably serves to attract fish or other large animals. the form of reproduction that you just mentioned, what exactly is it? A type of reproduction that does not involve the fusion of gametes or change in the number of chromosomes. who else reproduces this way? It is und in nearly half of the animal phyla, for example, Parthenogenesis occurs in the hammerhead shark and the blacktip shark.
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Bacteria [SEP] Predators
Some species of bacteria kill and then consume other microorganisms, these species are called "predatory bacteria". These include organisms such as "Myxococcus xanthus", which forms swarms of cells that kill and digest any bacteria they encounter. Other bacterial predators either attach to their prey in order to digest them and absorb nutrients, such as "Vampirovibrio chlorellavorus", or invade another cell and multiply inside the cytosol, such as "Daptobacter". These predatory bacteria are thought to have evolved from saprophages that consumed dead microorganisms, through adaptations that allowed them to entrap and kill other organisms.