Using the picture, in what position (A or D) must the moon be to cause a solar eclipse? Explain your answer using the reading passages.

According to the picture, during a solar eclipse the moon must be in position A, interposed between the sun and the earth.

Explanation:

A solar eclipse is due to the interposition of the moon between the sun and the earth, which produces that the solar rays do not reach certain points of the planet.

The lunar phase that is shown during a solar eclipse is the new moon phase, because the satellite does not show the side illuminated by the sun. At this point, the moon must be close to the solar orbital plane for the phenomenon to occur.

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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