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They live in our gut and make vitamin K, as well as the "beneficial" bacteria etc out competing the more dangerous ones. They help with other aspects of digestion, though sometimes that may make us a little gassy as they ferment small quantities of undigested or partially-digested food.

A large portion of the oxygen we breathe comes from prokaryotes in the ocean completing photosynthesis, using the CO2 dissolved in the water, and making more "space" (preventing complete saturation of the oceans with carbon dioxide) for CO2 from the atmosphere to be absorbed by the ocean.

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Related Questions

What are prokaryotic cells reproduced by?

Other prokaryotic cells


Is true of prokaryotic cells?

Prokaryotic cells do NOT have a nucleus.


What are the oldest cells on earth?

The first cells on earth were likely prokaryotic. This is because the prokaryotic cells are not complex like eukaryotic cells.


What is is the characteristic of prokaryotic cells?

Prokaryotic cells do not have a nuclear membrane.


What kinds of cells are prokaryotic?

Prokaryotic cells are bacteria and archaea. They are the single celled organism with no nucleus and prokaryotic cells are asexual.


Respiratory pathways in prokaryotic cells.?

respiratory pathways in prokaryotic cells.....


Do Prokaryotic cells have no membrane?

yes prokaryotic cells have cell membrane


Does bacteria have prokaryotic?

Bacteria have prokaryotic cells. They do not have eukaryotic cells.


Why is nucleus the most important part of the prokaryotic cell?

Well, prokaryotic cells are not really part of the body. A prokaryotic cell is pretty much the same as Bacteria. Are we made of Bacteria? No, we have bacteria in us but we are not made of Bacteria. The above statement is true. But! While Bacteria are prokaryotes, the reverse is not true. Archean cells are also prokaryotic. And! We actually have more prokaryotic cells in and on us then eukaryotic cells.


What is the difference between something eukaryotic and something prokaryotic?

There are quite a few differences between eukaryotic and prokaryotic cells. Prokaryotic cells do not have a nucleus, while eukaryotic cells do. Prokaryotic cells are not found in humans while eukaryotic cells are. Prokaryotic cells are primitive while eukaryotic cells are much more evolved.


Do only prokaryotic cells have vacuoles?

Only eukaryotic cells have vacuoles, prokaryotic cells dont have them


Do prokaryotic cells have a membrane?

Yes.Both Prokaryotic Cells and Eukaryotic Cells have an outer cell membrane.But, prokaryotic cells do not have membranes around their organelles (inside the cell), whereas eukaryotic cells do.