Honors Biology (HBio) Evolution Practice Exam

What is phylogenetics?

The study of the origin of life. The study of evolutionary relationships among organisms using data such as morphology, DNA sequences, and fossils. The distribution of ecosystems. The genetics of single genes only.

Correct Answer:

The study of evolutionary relationships among organisms using data such as morphology, DNA sequences, and fossils.

Explanation:

Phylogenetics is the study of evolutionary relationships among organisms, inferred from evidence such as morphological traits, DNA sequences, and fossil data. By comparing similarities and differences across species, scientists construct phylogenetic trees that reflect how species are related through common ancestry and how lineages split over time. Morphology shows shared physical features, genetics reveal how closely related organisms are at the DNA level, and fossils provide time context and transitional forms that help anchor the history of life. This approach synthesizes multiple kinds of data to map the relationships among many organisms, rather than focusing on the origin of life, where organisms live today, or the behavior of single genes in isolation.

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