Name two nitrogen containing molecules essential for life.
Name two things essential for life on earth.
Name two biological compounds of which nitrogen is an essential component
Carbohydrates are essential for life in both plants and animals. Name the carbohydrates that are used as storae molecules in plants and animals, also name the carbohydrate which is present in wood or in the fibre of cotton cloth.
Name the non-metal which is essential for maintaining life and inhaled during breathing.