Which statement about microevolution and macroevolution is true? microevolution can lead to macroevolution. macroevolution can lead to microevolution. genetic drift cannot affect microevolution. natural selection only acts on macroevolution.

Microevolution can lead to macroevolution.

Microevolution refers to the formation of species through the process of speciation. The element responsible for this process is natural selection. In this process changes in the traits occur with time. Macroevolution refers to the development of major group of organisms from groups of species that are distinctly different. For example development of mammals from non-mammalian species or evolution of whales from terrestrial mammals.

Macroevolution refers to the large number of changes that occur in the characteristics of the living organisms, like the evolution of entirely new species from previously existing species. Macroevolution is the result of many  microevolution processes.

Therefore, microevolution can lead to macroevolution is the true statement.

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explanation:

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.

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