The graph shows the oxygen dissociation curves for haemoglobin from three different animals
Which of the haemoglobins, X, Y or Z, would be present in each of the animals 1, 2 or 3?
1 an adult human
2 a fish living in water that has a very low oxygen concentration
3 a very active mammal whose tissues have a much higher rate of respiration than an adult human
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1
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2
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3
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A B C
D
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X Y Y
Z
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Y X Z
Y
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Z Z X
X
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