This document introduces biology as the study of life and living organisms. It defines biology and describes the key unifying themes, including that all living things are made up of cells and evolve over time. The characteristics of living things are that they reproduce, grow, develop, obtain and use energy, and respond to their environment. Biology can be studied at different levels of organization, from atoms to entire ecosystems. The document also lists several branches of biology such as zoology, botany, ecology, and molecular biology.

1. Introduction to Biology
Prepared by:
MR. KEVIN FRANCIS E. MAGAOAY
Faculty, SHS Biology Department
C h a p t e r 1

2. Learning Objectives:
 Define biology as a science
 Identify and describe the properties of life
 Infer and justify if something is living or non-living
 Describe levels of organization among living things
 Tabulate examples of different sub-disciplines in
biology

3. Overview:
 Definition of Biology
 Unifying Themes in Biology
 Characteristics of Living Organisms
 Levels of Biological Organization
 Branches of Biology

4. What is Biology?
 Biology is a natural science concerned with the
study of life and living organisms, including their
structure, function, growth, evolution,
distribution, identification and taxonomy.

5. Unifying Themes in Biology
 Cell theory as a description of living systems.
 Continuity of life is explained by the molecular
basis of inheritance.
 Function and structure are interdependent.
 Evolution change prompts diversity of life.
 Emergent properties arise from the organization
of life.

6. Characteristics of Living Organisms
 Living things are made up of cells
 Living things reproduce
 Living things grow and develop
 Living things obtain and use energy
 Living things respond to their environment

7. Levels of Biological Organization
 Atom
 Molecule
 Organelles
 Cell
 Tissue
 Organ
 Organ system
 Individual organism

8. BiologyBranches of

9. Zoology Botany

10. Ecology Anatomy

11. Morphology Physiology

12. CytologyMolecular Biology

13. Developmental Biology

14. Parasitology

15. Entomology Microbiology

16. Histology Genetics

17. Virology Biochemistry

18. Limnology Marine Biology

19. Immunology Mycology