Which statement best explains both why evolution didn't favor the development of heads on jellyfish, and why the most efficient predators in the animal kingdom have long, narrow bodies?

+2 votes

 

The limited size of cnidarians and animals in other basal lineages restricted the development of a head region and prevented the evolution of bilateral symmetry.

Jellyfish are protostomes, and the evolution of heads and long body types only evolved in deuterostomes.

Jellyfish are triploblastic animals, all of which evolved radial symmetry and the absence of heads.

The evolution of bilateral symmetry provided for efficient movement and triggered the development of cephalization, allowing for better hunting and feeding abilities.

 

asked Dec 29, 2012 in Biology by anonymous
    

1 Answer

+1 vote

 

The evolution of bilateral symmetry provided for efficient movement and triggered the development of cephalization, allowing for better hunting and feeding abilities.

 

answered Dec 29, 2012 by Ytwsa ~Expert~ (1,092 points)

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