<span>There would be
a delay between the ECG pattern and the resulting beat of the heart because it
takes time for the pulse to travel from the systole (ventricular contraction)
to the radial artery. Pulse cannot be felt in the finger. It can be felt with a
pulse oxymeter.</span>
Working down mate, my best answer would be carbon monoxide, but I'm not studying exactly what you are. All those answers are logical except ozone.
Answer:
the awnser is germinating seeds.
i got this awnser correct on my test :)