All living plants and animals need ________ for their growth as it is an important constituent of proteins.
Hydrogen
Nitrogen
carbon dioxide
Oxygen
All living plants and animals need nitrogen for their growth as it is an important constituent of proteins.
All living elements-the birds, animals and plants, forests, fisheries are ___
Solve the puzzle using the clues given below.
Clues : Across
(1) Unicellular animal
(2) Animal with tissue level organisation
(3) Single living thing
(4) Where living things live
(5) All animals and plants living together