3) What would have happened if we did not have backbone?
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Explanation:
If we don't have a back bone. we won't be able to sit upright and do some works
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The backbone is present from the base of the skull to the pelvis and protects the spinal cord and also provides support for the body. it enable us to sit straight, walk and move around with an erect posture.Without a backbone, we would not have an erect posture, also the spinal cord would have been easily injured.
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