What genetic factor is most likely to result in the extinction of an entire species?
A. a lack of genetic variety in the population
B. a genetic defect in a few members of the population
C. a lot of genetic variety in a population
D. a genetic resistance against many diseases

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.

‘which reaction would most likely require the use of an inert electrode?

What happens to the concentration of hydronium ions as the ph of a solution increases? a. hydronium ion concentration stays the same b. hydronium ion concentration decreases c. hydronium ion concentration increases