Which principle tells us that rock layers separated by a valley, but otherwise similar, are assumed to have once been continuous?

superposition

faunal succession

original horizontality

lateral continuity

Lateral continuity.

Explanation:

  According to this principle, rocks that are similar but separated by an erosional feature like a valley can be assumed to be originally continuous. This means that once the rocks were together and because of the erosion of the earth they get separated.

  I hope this answer helps you.

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.