Which event is likely to trigger succession? O low tide
O destructive hurricane
O typical winter
O thunderstorm

What function does a limb serve in each animal how are the limb bones of the four animal similar based on the similarities what can be inferred about the evolution of the poor animals

What type of appendages do sponges cnidarians roundworms annelids mollusks arthropods echinoderms and vertebrate have? jointed, not jointed, absent  

Identify the structures ! 20 points