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The insects do not have blood pigments because

  • A.There is no blood
  • B.Blood does not have a respiratory function
  • C.Tissues have pigments
  • D.Pigments are elsewhere

Answer: B

Insects have no blood pigment because their blood has no respiratory function.

Oxygen reaches the tissues directly through a branching system of air tubes, the tracheae, which open at the spiracles. The haemolymph carries food and waste but no oxygen, so it needs no carrier.

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