<span>In the past, human populations were controlled by </span>Disease and Famine
Do you have a picture? It would really help answer your question
<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>
A. Natural Selection. This is because the weeds that are not resistant to it die out before they can reproduce, but the resistant ones grow to maturity and then reproduce, passing down the resistance gene. Over time, the resistance gene would become a normal thing in weeds, while the non-resistant gene would not exist anyone, since the gene could not be passed on.
