) Choose the answer that best describes the geologic process that contributes to the formation of fault-block mountains. A. The Earth's crust is pushed together which tilts layers of rock on their side producing steep scarps. B. The Earth's crust is pulled apart creating deep folds and then pushed together generating steep scarps. C. The Earth's crust stretched from swelling underneath and vertical movement by blocks generates steep scarps. D. The Earth's crust is pushed together which forces up blocks vertically creating steep scarps.

B) The Earth's crust is pulled apart creating deep folds and then pushed together generating steep scarps to create fault-block mountains

what's the

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.