What is hemoglobin?
A) A reliable source of oxygen
B) A protein that is colorless when deoxygenated
C) An iron-containing respiratory protein
D) A protein found in invertebrates such as crabs and octopus
E) A by-product of gas exchange
Correct Answer:
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Q11: Paired lungs are characteristic of _.
A)
Q12: Air is continuously forced through tubes that
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