Evolutionarily, as animals increased in behavioral complexity, the pairs of ganglia in the anterior ends of their bodies fused to form
A) neural nets.
B) peripheral nervous systems.
C) brains.
D) spinal columns.
E) ventral nerve cords.

Question

Quizplus · Accepted Answer

The fusion of ganglia in the anterior end of animals' bodies led to the formation of brains, which allowed for increased behavioral complexity. This occurred through the evolution of different groups of animals, such as invertebrates and vertebrates. Therefore, the correct option is (C) brains.

Evolutionarily, as Animals Increased in Behavioral Complexity, the Pairs of Ganglia