The statement 'Karina says the change in the guppy population was caused by a mutation' is correct. Mutations change the frequency of phenotypic traits in a population across generations.
<h3>What is evolution?</h3>
The word 'evolution' refers to descendence with modification which especially happens due to the process of natural selection.
The mutations in the genetic material serve as raw material for natural selection and consequently for evolution.
In this case, Karina must be right because the change in the frequency of the phenotype can be caused by the emergence of beneficial mutations in individuals that live in a given environment.
These types of mutations (beneficial mutations) can fix and increase their frequency across generations.
Learn more about evolution and mutations here:
brainly.com/question/14438201
