<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>
Because Thomson's cathode ray tube experiments led to a very important scientific discovery, the electron.
1 out of 2 chances. If he was tested for CF at a certain time, he may not have had CF strong enough for the radar to detect it. However, the mother may also carry CF, which could lead to a stronger chance of CF in the next child.
