Consider the Phylogeny Below

question 6

Multiple Choice

Consider the phylogeny below. Segmentation is labeled on the phylogeny for the two groups showing the trait. Why isn't segmentation mapped on the phylogeny at the place indicated by the arrow?

• A)The traits mapped on a phylogeny do not represent the number of times the trait has evolved.
• B)Segmentation is a result of convergent evolution and evolved twice in protostomes.
• C)The loss of segmentation cannot be confirmed in nematodes.
• D)It is unclear when segmentation evolved in deuterostomes.

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Definitions:

Dimensional Information

Data or characteristics that can be measured along a continuum or scale, often used in assessments or descriptions of psychological phenomena.

Categorical Information

Data or knowledge grouped into categories or specific groups based on shared features.

DSM Diagnosis

A process of identifying mental health disorders based on the criteria outlined in the Diagnostic and Statistical Manual of Mental Disorders.

DSM-5

The Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, which is a standardized classification of mental disorders used by mental health professionals in the United States.