Biology is the science responsible for studying life and the interactions between living beings. When we say that biology is responsible for the study of life, we are referring to living beings and their metabolic, reproductive and evolutionary processes, in addition to studying the construction and influences of these habitats in general. Thus, we can affirm that biology allows the study of:
The relationship between fungi and trees
The distribution of sand on the ocean floor
The way chemicals act in the stomach.
However, biology is not the science responsible for studying the speed with which a hummingbird flies. Although the beixa-flor is a living being, speed is a variable studied by physics, which is another science.
"An organism in which the two copies of the gene are identical — that is, have the same allele — is called homozygous for that gene. An organism which has two different alleles of the gene is called heterozygous."
