Assertion :Vertebrate blood can carry larger volumes of $O_{2}$ %. Reason: The presence of respiratory pigment in blood enables it to carry more $O_{2}$ than the same blood could carry without it.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Both Assertion and Reason are incorrect.

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Respiratory pigments are generally found in the blood of all animals. It is a chemical material which has high affinity to combine with oxygen of atmosphere in lungs at their high pressure and forms such compound which can be transported with blood, to the tissues of the body and then releases oxygen in tissue where pressure of oxygen is less. Thus it increases the oxygen carrying capacity of blood. Mainly four types of respiratory pigments are found in animals -
Haemoglobin
Haemocyanin
Chlorocruorin and
Haemerythrin
The vertebrate blood has the highest carrying capacity for oxygen, as it has four sub units for oxygen binding.

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Assertion :Vertebrate blood can carry larger volumes of O2 %. Reason: The presence of respiratory pigment in blood enables it to carry more O2 than the same blood could carry without it.

Assertion :Vertebrate blood can carry larger volumes of $O_{2}$ %. Reason: The presence of respiratory pigment in blood enables it to carry more $O_{2}$ than the same blood could carry without it.