1. Introduction to Biology

Short Definition

Biology is the branch of science that studies living organisms and their life processes.

Detailed Explanation

Biology is derived from two Greek words: Bio meaning life and Logos meaning study. Therefore, Biology means the study of life.

It deals with all living organisms such as plants, animals, humans and microorganisms. Biology helps us understand how living things grow, reproduce, obtain energy, respond to their environment and maintain life.

Main Branches of Biology

• Botany: Study of plants
• Zoology: Study of animals
• Microbiology: Study of microorganisms
• Genetics: Study of heredity

Characteristics of Living Organisms

• Living things are made of cells.
• They grow and develop.
• They reproduce.
• They need energy.
• They respond to stimuli.
• They maintain internal balance (homeostasis).