Might just be D must of them don't seem right to me
The correct answer is: a feedback mechanism.
The bionic pancreas is bio-engineered device used for the regulation of blood sugar levels in order to maintain body homeostasis. The bionic pancreas includes a sensor that monitors blood sugar levels and sends a signal to a separate device that will then release the appropriate hormone into the bloodstream to return blood sugar levels back to normal. This device is very functional because of its ability to dose insulin and glucagon based on continuous sugar blood measurements.
The mixture of gases that is thought to have made up Earth's early atmosphere is hydrogen, water vapor, ammonia, methane, carbon dioxide<span>. This is previous to life so oxygen was not present because it was produced when green plants existed to produce oxgygen through photosynthesis. Ozone was absen and so the uv radiation entered the atmosphere and it is thought that (along with electrical discharges) could vave contributed to the formation of the first organic molecules from the given mixture of inorganic gases.</span>
B.) Denitrification is the answer
