A student finds a cast fossil of a fish and concludes that the fossil must be made of sedimentary rock. What evidence best supports the student’s conclusion? A. Only marine fossils form in sedimentary rock.
B. Sedimentary rocks are different colors and fish bones will fossilize well in this type of rock.
C. Nearly all fossils form in sedimentary rock.
D. Fish fossils only form on the shore in sedimentary rocks.

the cell theory states that all living things including animals, as well as plants, are made of cells.

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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