At what point in the food chain do organisms develop a cerebral cortex? Crusteaceans don't have one, nor do fish... all mammals do. What about lizards? Birds?
2006-06-16 08:27:05 · 4 answers · asked by weofui 2 in Science & Mathematics ➔ Biology
Hmmm... I was under the impression that fish didn't have a cerebral cortex, but they're vertibrates.
2006-06-16 09:17:00 · update #1
Great question!
Fish have what we might call the "beginning" of a cortex. Non-vertebrate chordates do not. It should be noted that cephlopods have a nervous system that rivals a cortex (certainly surpasses that of fish).
2006-06-16 13:06:00 · answer #1 · answered by skeptic 6 · 1⤊ 1⤋
Mammals have the NEOcortex
2006-06-16 13:45:56 · answer #2 · answered by gopigirl 4 · 0⤊ 0⤋
I heavily doubt all and sundry "chanced on" it. it particularly is the term for the outer layer of the innovations, the grey count. the reason no-one "chanced on" it particularly is because of the fact no-one, further, "chanced on" the middle.
2016-12-08 21:40:14 · answer #3 · answered by hayakawa 4 · 0⤊ 0⤋
non-vertebate and vertebrate
2006-06-16 08:30:21 · answer #4 · answered by ashish v 2 · 0⤊ 0⤋