4. Differential/ indicator medium: differential appearance:
Certain media are designed in such a way that different bacteria can be recognized on the basis of their colony colour. Various approaches include incorporation of dyes, metabolic substrates etc, so that those bacteria that utilize them appear as differently coloured colonies. Such media are called differential media or indicator media. Differential media allow the growth of more than one microorganism of interest but with morphologically distinguishable colonies.
Examples of differential media include:
Although Martin Luther and other Protestant reformers in the 16th century held that eternal salvation is attained solely through faith (a belief known in Latin as sola fide ), the surveys show that many Protestants today say instead that eternal salvation is attained through a combination of faith and good works – which is the traditional Catholic position. Indeed, in most of the Western European countries surveyed, Protestants who believe that salvation depends on both faith and works outnumber those who say salvation comes through faith alone.