Explanation:
Oxygen is a gas that your body needs to work properly. Your cells need oxygen to make energy. Your lungs absorb oxygen from the air you breathe. The oxygen enters your blood from your lungs and travels to your organs and body tissues
In the case of vaccines, we’re injected with antigens from a specific disease. Our body is able to make these antibodies as an immune response. This ensures that if we do get the disease, it will not likely be as serious because our bodies will already know how to fight it.
An increase in food and a decrease in predators would most likely genetic Variation in a population.
It is a change of frequency in a genes variant which is called genetic drift. this kind of scenario will result to smaller large population and larger small population
