Number one is D
Number 2 is b im pretty sure
<span>c.)The product only has different physical properties than the reactants because a chemical reaction occurred.
This is because rust can behave differently than oxygen and iron. This is because a chemical reaction has happened- a chemical reaction is when a new product is formed. Rust can be change chemically and physically. </span>
1. mitochondria
2.metabolism
3.respiration
Hope this helps!! :)
<span>The most electronegative atoms typically present in biological molecules are O and N.
Hope this helps
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