Refer to the Figure

question 233

Short Answer

Refer to the figure. The figure shows the phylogeny of seven species of beetles (A through G).The figure also shows whether the beetles have (marked with check) or do not have (marked with an x) one of three stripes.It also states the color of the beetle (R for red and G for green).
A synapomorphy shared by species C and D, but not by species A and B, is the presence of stripe _______.

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Definitions:

Interpretable Nonequivalent Groups Design

A research design involving comparison between groups that are not randomly assigned but are compared on outcomes to assess treatment effects.

History

A field of study concerned with the analysis and interpretation of past events.

Internal Validity

The extent to which a study can establish a cause-and-effect relationship free from external influences or confounding variables.

Simple Interrupted Time-Series Design

A research design analyzing data collected at regular intervals over time to determine the effect of an intervention.