Which prehistoric creature was the mother to all vetebral creatures?
#72563. Asked by tragic_flawed. (Nov 22 06 10:54 PM)
Vertebrates have been traced back to Myllokunmingia during the Cambrian explosion (530 million years ago), the ostracoderms of the Silurian Period (444 million to 409 million years ago), and the conodonts, a group of eel-like vertebrates characterized by multiple pairs of bony toothplates.
Every answer word contains the letters ALL. Another word is put around these letters to make another word. The two words are defined in each clue in no particular order. e.g. wager on dance show = BALLET (BET on ALL)
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