An example of this would be eye color. You can put contacts in changing the color but not necessarily changing the genes.
The heart’s electrical system is responsible for making and conducting signals that trigger the heart to beat. These signals cause the heart’s muscle to contract. With each contraction, blood is pumped throughout the body. This happens 24/7 without us having to monitor it all the time so that our heart does not stop.
A digestive system is a part of the body that processes food into energy
Answer: natural selection
Explanation: Maybe because the A woodpecker was able to adapt a lot easier than the woodpecker B and its evolution was better
