Ganglia Are

Question

Ganglia are
A) clusters of neuronal cell bodies.
B) precursors to evolution of a brain.
C) are an evolutionary step between nerve nets and true brains.
D) evolved as animal behaviors became more complex.
E) all of these.

Accepted Answer

Ganglia are indeed clusters of neuronal cell bodies (A), and they represent a significant evolutionary development in the nervous systems of more complex organisms. They can be seen as precursors to the evolution of a brain (B), marking a transition from simpler nerve nets to more centralized and complex nervous systems (C). This evolution likely occurred as animal behaviors became more complex (D), necessitating more sophisticated neural structures for processing sensory information and coordinating responses.