What Would You Find at the Root of a Phylogenetic

question 129

Multiple Choice

What would you find at the root of a phylogenetic tree?

• A) All living species
• B) Some living species and some dead species
• C) The common ancestor of some, but not all, of the species depicted in the tree
• D) The common ancestor of all species depicted in the tree
• E) Synapomorphies

Understand and differentiate between schizophrenia and dissociative identity disorder through definitions, symptoms, and types of disorders.

Explain the historical and potential future trends in autism diagnosis rates and the effectiveness of the dimensional approach in diagnosing autism.

Describe the components, development, and the role of negative reinforcement in obsessive-compulsive disorder.

Understand the etiology, diathesis-stress model, and biopsychosocial approach in the context of generalized anxiety disorder.

---

Definitions:

Standard Scores

Standard scores are a type of score that have been transformed to fit a normal distribution, with a mean of zero and a standard deviation of one, allowing comparison across different tests or assessments.

Percentile

A statistical measure indicating the value below which a given percentage of observations in a group of observations fall.

Percentage

A portion in relation to the whole. A ratio between two dichotomous outcomes.

Scales of Measurement

Refers to the methods used to categorize and quantify variables in research, such as nominal, ordinal, interval, and ratio scales.