Question

give answer of bio 1 question

Answer 1

it is necessery because oxygenated blood is useful and to convert glucose to energy as compared to oxygenated blood is waste which is being not used by any organism.

Answer 2

It is necessary to separate oxygenated and deoxygenated blood in mammals and birds so that there is no mixing of the two. Also, it makes the circulatory system more efficient and helps in maintaining constant body temperature.

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