A change at the molecular level leads to a change in phenotype if the change happens in the DNA of organisms.
It is a change to the genome of organisms.
A change to the DNA sequence of organisms may or may not manifest in the morphological appearance of organisms.
A change to the DNA sequence of organisms means that entire new proteins would be synthesized and only in this way can the phenotype of organisms be altered as a result of a change at the molecular level.
More on mutations can be found here: https://brainly.com/question/13923224
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