An Excess of Nonsynonymous Fixed Mutations Between Species Is Likely

question 21

Multiple Choice

An excess of nonsynonymous fixed mutations between species is likely due to:

• A)natural selection.
• B)random genetic drift.
• C)a catastrophic event.
• D)inbreeding.
• E)immigration.

---

Definitions:

Interaction Effect

effect of one independent variable on the dependent variable at the different levels of another independent variable.

Main Effect

Effect of an independent variable on the dependent variable within a factorial research design.

Simple Effect

Effect of one independent variable at one of the levels of another independent variable.

Independent Variable

The factor in a study that the experimenter alters to see how it impacts the outcome variable.