The phosphate transport system in bacteria imports phosphate into the cell against the phosphate concentration gradient. the energy for phosphate import is provided by a ph gradient across the membrane (lower ph outside the cell than inside the cell), rather than by atp hydrolysis. the bacterial phosphate transport system is an example of what?

Active uptake.

Explanation:

This phosphate active uptake is mantained mainly by two systems: Pst system, which is only used in situations of phosphorus deficiency, when the level of the external Pi (inorganic phosphate) is lower than 20 micromolar. The Pit system is used constitutively, it means, at all time. These systems relies in several membrane proteins.

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

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