Neritic Zone.
Two organisms that always inhabit health care environments are bacteria and viruses. Bacteria are one-celled plants that lack chlorophyll. Viruses are tiny organisms that may lead to illnesses, including colds or flu.
Physical factors of an estuary include salinity levels, temperature variations, turbidity (clarity of water), tidal currents, and substrate composition (the type of material on the estuary floor). These factors greatly influence the ecosystem and species that inhabit the estuary.
Ecosystem
Lactobacillus acidophilus ( L. acidophilus ) a probiotic, or "friendly" bacteria. these healthy bacteria inhabit the intestines and vagina and protecting against the entrance and proliferation of undisirable organisms that cause disease.
Microorganisms such as thermophiles, algae, and bacteria are known to inhabit geysers due to their ability to thrive in extreme heat and acidic conditions. These organisms form colorful mats or biofilms around the edges of geyser pools.
Birds and insects.
Archae
The two domains that include only prokaryotic organisms are Bacteria and Archaea. Both domains consist of single-celled organisms that lack a nucleus and other membrane-bound organelles. Bacteria are known for their diverse metabolic capabilities and ecological roles, while Archaea often inhabit extreme environments and have unique biochemical pathways.
The similarity between organisms in the domains of Bacteria and Archaea is that their members are prokaryotes while the difference is that Archaea are single-celled organisms without a nuclei while bacteria are single-celled organisms that lack a nucleus, mitochondria, chloroplasts, golgibodies and ER.
Upwards to the trillions.
The mouth is an ideal habitat for bacteria, as it is moist, has a constant temperature and a constant supply of nutrients.
Bacteria do not inhabit cells. Bacteria are one celled organisms that can live apart from other cells given the right environment (ie. food source, oxygen if an aerobic organism). Viruses, on the other hand, must invade a cell in order to multiply. Viruses use the cell's own internal "machinery" to reproduce to high numbers. At that point they break free from the host cell and go on to invade other cells.