A limerick on soil erosion five lines can someone help me.

Soil erosion is naturally quite a mess

I think of it while I'm badly playing chess

Today I feel particularly blue

Why, it is not that I don't have a clue

But, Soil erosion influence me much less

Explanation:

A limerick is a humorous poetic form of AABBA rhyme scheme witha rolling sound that is mostly composed in five lines of which first, second and fifth are longer and in rhyme together, and thirth and fourth are shorter and rhyme as well. It is common for writting a children songs such is 'hickory, tickory , dock'. It is named after LImerick in Ireland.

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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the missing space is phylum