B-valine,histidine,threonine,phenylalanine
<span>Choice (a) is the most correct. Fish must excrete large quantities of water as a way of keeping the homeostasis in their cells. Otherwise, the water levels in the cell could become too high and the cells would likely rupture, leading to the death of the organism.</span>
We breathe in air, not straight oxygen. Attached is a pie chart showing roughly what percentage of what is in the air we breathe