Explain why mountains are formed on the continental crust during convergent movement.

When the continental and the oceanic plates collide, the oceanic plate subsides under the continental plate because it is denser.   Its higher density is because it is ‘wet’.  As the two collide, the stress and friction between the two causes the overlying continental crust to uplift and fold into mountain ranges at the boundary.

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides

ask your friends for what they got then copy it down if you don't have any friends which is fine than google it or pay the teacher