<span>If my memory serves me well, right answer is: </span><span>Epiglottis </span>is the thin cover that stops food and liquid from entering the larynx.
Concentration of carbon dioxide on each side of the membrane.
OK after reviewing the given answers I'm going to go with C. as the best choice because reading all of the others will tell you that they are longer than a epoch.
Answer: Olight + water + carbon dioxide → oxygen +.
glucose
Explanation
First, you need to do the multiplacation that's inside the perenthises.
Second, you will need to divide the two answers which will give you that first box.