The Embryonic Nervous Systems of Peanut Worms (Sipuncula)and Spoon Worms

question 15

Multiple Choice

The embryonic nervous systems of peanut worms (Sipuncula) and spoon worms (Echiura) show that these worms ________.

• A) are descended from segmented ancestors
• B) have appendages that are homologous with arthropod appendages
• C) do not express Hox genes during development
• D) are similar to each other because of homoplasy
• E) are surprisingly closely related to vertebrates

---

Definitions:

Physiological

Relating to the normal functions of living organisms and their parts, including all physical and chemical processes.

Self-concept

An individual's perception of themselves, shaped by their thoughts, feelings, and experiences.

Core Value

Fundamental beliefs or guiding principles that dictate behavior and action within an organization or individual, helping to shape its culture and decision-making.

Key Trait

A distinguishing characteristic or quality that significantly contributes to the identity or functionality of something.