A giraffe's tongue is over 18 inches (46 cm) long, and the roof of the mouth is grooved to easily strip leaves off branches. Since giraffes are extremely efficient at processing nutrients and liquids from food, they can survive without water for long periods of time.
The Authoritarian Theory describes the situation where states view the mass media as an instrument at all ties. The role of the media is to mainly educate citizens, and acts as a propaganda tool for the ruling party.
Selective Media . Complex or defined media will also be cl assified as âselectiveâ if they support the. growth of only certain types of bacteria. Media can be made selective through the addition of. substances that enhance or inhibit the growth of particular types of bacteria.