1. how many vertabrae are

  1. what is a vertabrae and how is it different from a mammal?
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    2. death-star-roman asked by death-star-roman
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  2. 1. how many vertabrae are there in human?2. what is the excretory product of earthworm? 3. why do organism undergo aestivation?
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    2. ` asked by `
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