<span>B. The enzyme amylase was saturated, as all its active sites were occupied by substrate starch.
Each enzyme molecule has an active site in which it binds to a substrate to complete the enzyme-substrate complex. This means that there has to be a balance of enzyme molecules to substrate molecules. </span>
Answer:Valves stop blood flowing backwards
Explanation: Valve are flags of tissue that control the direction of the blood in our heart.,it prevent the backwards flow of blood. valves regulate blood from flowing back into the atria.The right and left atrio-ventricular valves prevent blood from flowing backwards into atria. When the ventricle is full,the valve prevent backwards flow of blood.
CO2 is returned to the atmosphere by all methods except photosynthesis.
Through photosynthesis, a plant actually takes CO2 from the atmosphere and produces oxygen in return.
Water, dissolved ions, large water soluble molecules, smaller minute molecules, and proteins
Answer:
reduction in carbon is the answer.
