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State one difference in each of the foll...

State one difference in each of the following with respect to the aspect stated within the brackets.
(i) Mitosis and meiosis (chromosome number)
(ii) Cranial and spinal nerves (total number in adults)
(iii) Tubectomy and vasectomy (parts operated)
(iv) Colourblindness and night blindness (caused due to)
(v) Cerebrum and spinal cord (arrangement of neurons)

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