Scientifically, describe the shape of a DNA molecule.

The double helix is a description of the molecular shape of a double-stranded DNA molecule. In 1953, Francis Crick and James Watson first described the molecular structure of DNA, which they called a "double helix," in the journal Nature.

Ok most of the air we breathe is hydrogen and oxygen photosynthesis is a reaction in plants that produces O or oxygen if there is not enough room for the air to circulate it would mean you don't have a very good supply of oxygen photosynthesis matters cause it takes in Co2 2 parts carbon and 1 part oxygen and the waste that the plants produce is oxygen and is what we breathes so that Si your answer