To Determine Conclusively That the 15 Galápagos Finch Species Are

question 47

Multiple Choice

To determine conclusively that the 15 Galápagos finch species are descended from a common ancestor, biologists could most effectively use ____.

• A) Darwin's notebooks describing his observations
• B) comparative molecular biology
• C) comparative embryology
• D) Mendelian genetics
• E) modern historical biogeography and Darwin's observations

---

Definitions:

Correlational Studies

Studies in which the investigator analyzes the relationships among variables that were in place before the study, without manipulating those variables.

Placebo Effects

Observable or measurable changes in health or behavior resulting from the administration of a placebo, demonstrating the power of belief and expectation in the healing process.

Double-blind

A study design in which neither the participants nor the experimenters know who is receiving a particular treatment, to prevent bias in the results.

Attention Deficit Disorder

A mental health disorder characterized by a persistent pattern of inattention and/or hyperactivity-impulsivity that interferes with functioning or development.