Question

what the source of carbon, oxygen, hydrogen and nitrogen​

Answer 1

Answer:

Nucleic acids are organic compounds that contain carbon, hydrogen, oxygen, nitrogen, and phosphorus. They are made of smaller units called nucleotides. Nucleic acids are named for the nucleus of the cell, where some of them are found. Nucleic acids are found not only in all living cells but also in viruses.

Answer 2

Plants usually take carbon and oxygen from the atmosphere whereas nitrogen is taken from soil .

Hydrogen is taken from water,it can be from atmosphere or from soil.

Soil contain microorganisms that are nitrogens fixers which converts atmospheric nitrogen to different compounds which are important to plants .