Biology is a branch of science which deals with the relation between a living organism with the entire environment. It deals with all living organisms like plants animals microbes etc.
It is further divided into who many sub-branches like
1. Botany -a branch of Biology which deals with plant study.
2. Zoology-branch of Biology which deals with an animal study
3. Microbiology -the branch of Biology with deals with microbes ( bacteria, fungi, yeats)