What is a characteristic of sponges that is NOT shared by more derived (later-evolved) animal groups?

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MCQs on the evolutionary history, phylogenetic relationships, comparative anatomy and physiology, and ecological interrelationships among animal taxa, as well as the evolutionary pressures that led to physiological and ecological differences among species and groups.
 


What is a characteristic of sponges that is NOT shared by more derived (later-evolved) animal groups?