I am dayalanand roy, a student of biology. My interests spread from life to time.This is my first post on this site. Here, I wish to share only one thing with all of you, the greatest lesson that biology has taught me. This is- we all are one. Not only we human beings, but every living being,from bacteria to plants, from amoeba to man, all have descended from a common mother cell. A realization of this fact can transform our life, and our world too. Thanks for reading. Have a good day, have a good world.