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Reading Comprehension :: RE: OG Conodonts, the spiky phosphatic remains

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Author: DavidG@VeritasPrep
Posted: Wed Sep 27, 2017 11:10 am (GMT -8)

NandishSS wrote:
Hi Dave/Guru/Experts,

Tried my best to map the above passage. Please let me know is this right?

Conodonts-->controversial of fossils--> implications for hypotheses concerning the development of the vertebrate skeleton.

defensive development --> easy prey for numerous invertebrate carnivores-->But Teeth were more
primitive than external armor according to this view, and the earliest vertebrates were predators.

The lack of any mineralized structures --> jawless fishes such as the ostracoderms --> hard parts that first evolved in the mouth --> defense

Can you please help me with these questions?
The gist is of this passage is that there's a debate between two camps regarding the evolution of vertebrates. The traditionalists believe that bony scales (protection) came first. The alternative view is that teeth (predation) came. The new discovery favors the teeth (predation) hypothesis. That's the main thing you want to come away with.
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