Bacteria and archaea are almost always microscopic, while a number of eukaryotes are also microscopic, including most protists, some fungi, as well as some animals and plants.

* Bacteria would not survive the immense heat and forces of an impact on Earth, also of the impact that launched them into space from their original habitat.

Bacteria in the colon ( large intestine ) can produce a range of vitamin K < sub > 2 </ sub > forms, and can also convert K < sub > 1 </ sub > into K < sub > 2 </ sub > ( MK-7 homolog ).

Bacteria also secrete proteases to hydrolyse ( digest ) the peptide bonds in proteins and therefore break the proteins down into their constituent monomers.

In addition to the domain Bacteria ( once known as Eubacteria ), microfossils of the domain Archaea have also been identified.

Bacteria like E. coli also indicate water pollution.

Bacteria are capable of not only altering the enzyme targeted by antibiotics, but also by the use of enzymes to modify the antibiotic itself and thus neutralise it.

Bacteria have restriction enzymes, also called restriction endonucleases, which cleave double stranded DNA at specific points into fragments, which are then degraded further by other endonucleases.

Bacteria can also use the blood to spread to other parts of the body ( which is called hematogenous spread ), causing infections away from the original site of infection.

Bacteria within the Deinococcus-Thermus group may also exhibit Gram positive staining behaviour but contain some cell wall structures typical of Gram negative organisms.

Bacteria and archaea can also be lithotrophs and these organisms may respire using a broad range of inorganic molecules as electron donors and acceptors, such as sulfur, metal ions, methane or hydrogen.

Bacteria and microalgae may also live in the interstices of bottom sediments.

Bacteria which produce only lactic acid during fermentation are homofermentative ; those that also produce lactic acid and other compounds such as carbon dioxide, alcohol, aldehydes and ketones are heterofermentative.

Bacteria and archaea also can use chemiosmosis to generate ATP.

Diazotrophs are scattered across bacterial taxonomic groups ( mostly in the Bacteria but also a couple of Archaea ).

They also appeared on the 1985 hardcore compilation Cleanse the Bacteria, in addition to numerous other compilations, such as Not So Quiet On the Western Front ( Alt.

Bacteria, maggots and other organisms that may have ingested some of the subject matter may have also ingested any toxic substance within it.

Bacteria are also responsible for the chemical composition of the atmosphere, which affects weathering rates of rocks.

Bacteria of this genus also form root nodules.

The ATCC also has close working links with several other international culture collections, such as the UK's National Collection of Plant Pathogenic Bacteria ( NCPPB ), Landcare Research in New Zealand, the Collection Française de Bactéries Phytopathogènes ( CFBP, or Collection of Plant Pathogenic Bacteria ) in France, Belgian Co-ordinated Collections of Micro-organisms ( BCCM ), IBSF in Brazil, the Deutsche Sammlung von Mikroorganismen und Zellkulturen ( DSMZ, or German Collection of Microorganisms and Cell Cultures ), the Japanese Collection of Research Bioresources ( JCRB ), and others.

Bacteria, including Lactobacilli and Leuconostoc, break down these proteins and produce lactic acid which not only affects the flavor of the sausage, but also lowers the pH from 6 to 4. 5-5, preventing the growth of bacteria that could spoil the sausage.

Bacteria use a primase belonging to the DnaG protein superfamily which contains a catalytic domain of the TOPRIM fold type.

Bacteria may undergo high rates of gene deletion as part of a mechanism to remove TEs and viruses from their genomes while eukaryotic organisms use RNA interference ( RNAi ) to inhibit TE activity.

Currently, textbooks from the United States use a system of six kingdoms ( Animalia, Plantae, Fungi, Protista, Archaea, and Bacteria ) while British, Australian and Latin American textbooks may describe five kingdoms ( Animalia, Plantae, Fungi, Protoctista and Prokaryota, or Monera ).

Bacteria use quorum sensing to coordinate certain behaviors based on the local density of the bacterial population.

Bacteria that use quorum sensing constitutively produce and secrete certain signaling molecules ( called autoinducers or pheromones ).

Bacteria use several systems to obtain nutrients from other organisms in the environments.

Bacteria use quorum sensing to synchronise release of the molecules.

Bacteria that use sulpher rather than oxygen reside in the oxygen minimum zone.

Bacteria that live in detrital sediments create and cycle nutrients and biominerals.

Bacteria and enzymes dissolve organic matter on the water bottom interface, thus returning phosphorus to the beginning of its biogenic cycle.

Bacteria in the biofilm community can actually generate various toxic compounds that interfere with the growth of other competing bacteria.

Bacteria and other single-celled organisms live in the termite digestive system and digest cellulose providing nutrition and energy for these termites.

Bacteria, algae and fungi have been identified in amber that is 220 million years old, which shows that the morphology of microorganisms has changed little since the Triassic period.

Bacteria such as E. coli are unable to choose the direction in which they swim, and are unable to swim in a straight line for more than a few seconds due to rotational diffusion.

Bacteria constantly remodel their peptidoglycan cell walls, simultaneously building and breaking down portions of the cell wall as they grow and divide.

With some exceptions, Bacteria lack membrane-bound organelles as found in eukaryotes, but they may assemble proteins onto various types of inclusions such as gas vesicles and storage granules.

Bacteria are able to convert ammonia to nitrite and nitrate but they are inhibited by light so this must occur below the euphotic zone.

Bacteria obtain their nutrients via simple diffusion process across their cell-membrane, as they lack the sophisticated nutrient uptake mechanism found in eukaryotes.

The strip was about a boy called Will who had three germs inside him ( Ugly Jack Bacteria, Jeremy Germ and Iris the Virus ), and they were constantly making Will ill, requiring many visits to the doctor.

Bacteria are important decomposers ; they are widely distributed and can break down just about any type of organic matter.

Bacteria of the genus Wolbachia cause skewed sex ratios in some arthropod species as they kill males.

In addition, the molecular phylogenies of aaRSs are often not consistent with accepted organismal phylogenies, e. g. they violate the so-called canonical phylogenetic pattern shown by most other enzymes for the three domains of life-Archaea, Bacteria, and Eukarya.

Bacteria typically enter the lung with inhalation, though they can reach the lung through the bloodstream if other parts of the body are infected.

Bacteria evidently acquire territory as they spread out in a Petri dish.

Bacteria passes from the frass of the beetle into feeding wounds that reach into the vascular tissues of the plants, where they proliferate to the point of blocking the xylem.