Question

multiple choice question
populations of a single species that are quite distinct from one another phenotypically may be connected by populations of individuals that

do not migrate
do not undergo selection
exhibit intermediate phenotypes

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Explanation:

In a single - species, distinct phenotypic populations can be connected by individuals with intermediate phenotypes, which act as a bridge between the different phenotypic extremes. Migration and selection are not relevant to this connection in the context of the question.

Answer:

exhibit intermediate phenotypes