An ecosystem that is not sustainable can break down when a natural disaster occurs. this can lead to organisms in the ecosystem either leaving the area or dying off. increased biodiversity results in a more sustainable ecosystem because — a) a greater number of plant species means that there is less barren land b) a greater variety of species present allows more organisms to adapt after changes occur c) the transition area between two ecosystems is narrower d) there are fewer species to be affected by environmental stresses

a greater variety of species present allows more organisms to adapt after changes 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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bc blah

explanation:

bc blah