What is Biology? Biology is the scientific study of life and living organisms. It is a vast field that explores the structure, function, growth, evolution, and distribution of organisms, as well as the relationships between them and their environment. This branch of science encompasses various levels of organization, from molecular and cellular biology to ecology and global patterns of biodiversity. The fundamental unit of life is the cell, which is capable of carrying out all the processes necessary for an organism's survival. Cells are classified into two main types: prokaryotic and eukaryotic. Prokaryotic cells, such as bacteria, lack a nucleus and other membrane-bound organelles, Eukaryotic cells, found in plants, animals, fungi, and protists, have a distinct nucleus and various organelles. Organisms can be further categorized into different levels of organization. For example, cells of similar structure and function can group together to form tissues, which in turn make up organs. Organs working together form organ systems, which ultimately compose an entire organism. Biology also delves into the mechanisms of inheritance and the diversity of life. It explores how genetic information is passed from one generation to the next through the study of genetics Branches of Biology: Molecular Biology: This branch investigates the structure, function, and interactions of biological molecules, such as DNA, RNA, proteins, and enzymes. Molecular Biology Cell Biology: Cell biology, also known as cytology, studies the structure, function, and behavior of cells—the fundamental units of life. It examines cell organelles, cell division, cellular metabolism, and cellular communication. Cell Biology Genetics: Genetics explores the inheritance and variation of traits in organisms. It examines genes, heredity, genetic disorders, and the mechanisms of genetic expression and regulation. Genetic Biology Evolutionary Biology: Evolutionary biology focuses on the processes and patterns of biological evolution. It studies the mechanisms of species' descent and the development