What Does Recent Evidence from Molecular Systematics Reveal About the Relationship

question 34

Multiple Choice

What does recent evidence from molecular systematics reveal about the relationship between grades and clades?

• A) There is no relationship.
• B) Some, but not all, grades reflect evolutionary relatedness.
• C) Grades have their basis in, and flow from, clades.
• D) Each branch point on a phylogenetic tree is associated with the evolution of a new grade.

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