As early as the 9th century, it was suggested when organisms change, they may be better adapting to survive.
Explanation:
Natural selection, also called Survival of the Fittest, is the process in which the environment influences the fitness of species: <u>organisms that change to adapt better to the conditions they live in, have longer lives and reproduce to leave offspring with the same positive traits</u>.
Two very important people in the development of Evolution Theory are Lamarck (he came up with the theory of acquired characteristics) and Darwin (applied the 'survival of the fittest' to every organism on Earth).
The hemoglobin molecule has four binding sites for oxygen molecules: the iron atoms in the four heme groups. Thus, each Hb tetramer can bind four oxygen molecules.
