An interrupted conjugation experiment is conducted using the following strains: Hfr StrSx+y+z+ and F- StrRx-y-z-.Samples of exconjugants are tested at regular intervals for their ability to grow on minimal medium (MM) containing streptomycin plus compound X,Y,or Z.The table below summarizes the number of colonies obtained on the different media when conjugation was interrupted after 10,15,20,or 25 minutes. 
Based on these results,what is the order of entry of the four markers in question?
Definitions:
Phosphate
A salt or ester of phosphoric acid, commonly used in fertilizers, detergents, food additives, and for water treatment.
Degradable Wastes
Wastes that can break down into less harmful components over time through biological processes.
Dissolved Oxygen
The amount of oxygen gas dissolved in water, essential for the respiration of aquatic life.
Sewage Treatment
A process of removing contaminants from wastewater, primarily from household sewage, to produce an effluent that is suitable for discharge or reuse.
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