Astudent observes rock layers that are folded and appear to be scratched. select all of the geologic forces that might have caused this. a plate tectonics b glacial advance c magnetic reversal d seafood spreading

Answer: A plate tectonics

B glacial advance

Both plate tectonics and glacial advance and extensive geological phenomena that have the power to affect rock layers in the observed manner. Through the movement of the tectonic plates, rock layers can not only be folded, but also created or destroyed.

The enormous mass of ice contained within glaciers with a thickness of 3 to 4 km, is more than enough to warp and scratch rock layers. They have also moved large amounts of rock many kilometers from their original location.

you are certainly talking about this picture:

a: is the label of the white square, it is showing the  replication fork, formed by helicase (d) ==> so it is the site of dna separation and replication 

b: is a new dna brand that is following directly the replication fork, so it is continuous ==> built continuously from 5' to 3

c: dna polymerase cannot replicate dna on its own, it needs the of their proteins, and one of them plays the role of a clamp which fixes  the dna with the dna template and increases  the processivity of the enzyme. ==>   stops polymerase from falling off the  template.

d: is the enzyme responsible for forming the replication fork (helicase) ==> unwinds and separates dna into two strands

e: is the delayed strand, it is built  in the opposite sense of the helicase, so dna will be built in fragments ==> built  fragments from 5' to 3 joins

and finally f: is the enzyme that builds  the new dna strand (dna polymerase) ==>   adds nucleotides to make a new dna helix.

credit: gradman555p98x9p

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