Which of the following describes aggregations? a)porous marine invertebrates who pull water through their soft bodies in order to obtain
oxygen and nutrition

b)random fish in the same location, such as fish feeding in the same area of a kelp forest or coral reef

c)highly organized groups of fish, which swim in the same direction, at the same speed, and generally spaced evenly apart

d)groups of fish formed when fish loosely adjust their swimming to be near other fish, usually of the same size and species

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.

that's all i luck!

answer is d hope this