Answer D) : from testing the starch by iodine
Answer: b. reaction 3
Explanation: When an enzyme is present in a reaction acts as a catalyst, increasing velocity of reaction and decreasing the activation energy, when not present an enzyme the reaction velocity is very low and implies high activation energy, being unfavorable to the system
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I'm not sure if there were supposed to be options or not.
However, I believe the answer would be evaporation.
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<span>Prolonged stress due to sustained child abuse is associated with reductions in the size of the: hippocampus </span>