If the Two Sister Species on the Phylogenetic Tree Shown

question 29

Multiple Choice

If the two sister species on the phylogenetic tree shown differ from the other two species in a single character state (e.g., dark or light fur) , how many character state changes (evolutionary events) are needed to explain this pattern?

• A) one
• B) two
• C) three
• D) four

---

Definitions:

Temporary Amnesia

A short-term loss of memory, often resulting from stress, trauma, or other psychological factors.

Psychosocial Conflict

Internal or interpersonal struggles rooted in psychological and social factors.

Generativity

A term mostly used in psychology that refers to a concern for establishing and guiding the next generation, typically observed during middle adulthood.

Stagnation

A state of no growth, development, or progress, often used in the context of personal development or economic conditions.