Fish most commonly live in the upper part of the oceans in the thermoclines far from islands and continents near islands and continents in the deepest parts of the ocean

The right answer is in the upper part of the oceans

The majority of ocean fish swim at the surface because this is where there is the highest level of dissolved oxygen, and this is where the temperature is most suitable for their survival.

There are, of course, some fish living in the depths of the oceans.

step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.