Question

Out off all of these, which have a retina?

Choanoflagellata
Porifera
Cnidaria
Nematoda Arthropoda Onychophora Platyhelminthes Brachiopoda Mullusca Annelida Echinodermata Cephalochordata Urochordata Cyclostomes Chondrichthyes Osteichthyes Amphibia Reptilia Mammalia
 
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