मनुष्य सेल्युलोज को नहीं पचा सकता जबकि गायें ऐसा कर सकती हैं क्योंकि:

What type of dentition do humans have based on the fact that they get two successive sets of teeth during their lifetime?

Milk is a critical component of a balanced diet. Which essential macronutrient does milk primarily provide as the only complete animal-based source in a strict vegetarian diet?