Since birth, a 2-year-old female toddler has complained of blackish discoloration on wet nappy drying. She was the sole kid of a nonconsanguineous couple, and she was doing well. Her developmental milestones were all within normal limits. There were no abnormalities discovered during the clinical assessment. The urine sample was tested for silver nitrate and Benedict's test, which both came back positive. a) What would your first diagnosis be?
b) What tests would you recommend in order to confirm your diagnosis?

answer; /// i believe that the correct answer is ( monophasic ); ethinyl estradiol- ethynodiol diacetate is a monophasic oral contraceptive agent; ///

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.

when it is at an intermediate population density