The answer is natural selection. Charles Darwin popularised
the term "natural selection". The change in the heritable traits
characteristic of a population over generations. Natural selection is reproduction
of individuals due to differences in phenotype and the differential survival It
is a key mechanism of evolution.
The start from an are of high concentration to an area of low concentration until it's evenly spread out
Answer:
The respiratory system aids the supply of oxygen to the blood and the evacuation of carbon dioxide. when the heart takes in blood that as shortage of oxygen and abundance of carbon dioxide, the pulmonary arteries pumps such blood to the lungs.
As the lungs increases due to inflow of fresh air from the surroundings, oxygen is transported to enrich low-oxygen blood, and transport the carbon dioxide out of the lungs.
This freshly oxygen rich blood which now have a rich amount of hemoglobin is transported to the heart which then pump or circulated it to the entire body.
Hydrolisis reactions are involved in the break down of organic polymers to yield monomer. The reaction involves the splitting of a water molecule each time a bond in the polymer is broken.
<span>Despite their relatively small size, the kidneys receive about 20% of the heart's blood output for filtration.</span>