If you remove all of the functional groups from an organic molecule so that it has only carbon and hydrogen atoms, the molecule becomes a molecule.
a. carbohydrate
b. carbonyl
c. carboxyl
d. hydrocarbon

D. The molecule becomes a hydrocarbon, as only hydrogen and carbon atoms are present in the molecule. Also, all 3 other options would mean that other atoms, aside from carbon and hydrogen (such as oxygen) would have to be present for this molecule to exist.

The main role of dna in the  cell is the long-term storage of information. it is often compared to a blueprint, since it contains the instructions to construct other components of the  cell, such as  proteins  and rna molecules.the main function of rna is to carry information of amino acid sequence from the genes to where  proteins  are assembled on  ribosomes  in the  cytoplasm. mark brainliest, my work is good.

Lacking something of the ozone layer