Question Detail

ZOO 102 Foundations of Animal Systematics and Phylogeny Objective Question

Question

What does the term 'cephalization' refer to?
Options
A The development of a fluid-filled coelom
B The concentration of a nervous system at the anterior end
Correct Answer
C The evolution of secondary radial symmetry
D The formation of three germ layers
Correct Answer

Option B is the correct answer.

Detailed Explanation

Cephalization is the collection of an organized nervous system at the animal's anterior (head) end, made possible by bilateral symmetry.

Hint

It comes from the Greek word for 'head'.

Question Info