Which sphere is oxygen in our blood part of?
Lithosphere
Biosphere
Mesosphe...
![Biology](/tpl/images/cats/biologiya.png)
Biology, 18.03.2021 03:30, livy151515
Which sphere is oxygen in our blood part of?
Lithosphere
Biosphere
Mesosphere
Atmosphere
![answer](/tpl/images/cats/otvet.png)
Answers: 3
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