You didn't put any answer choices, but air and water are generally the greatest.
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<span>i think Comparative morphology
i could be wrong tho</span>
Answer:
Cells produce CO2 and use O2 thats why there is less oxygen in exhaled air bc cells used some and more CO2 bc body gets rid off extra CO2 like that
Explanation:
I hope I did't over complicate
Answer:
derivation of newton second law of motion
motion states thay the acceleration of a system is directly propotional
w=mg
