GENERAL SCIENCE - BIOLOGY
(ALTERNATIVE DELIVERY MODE)
Topics: Unifying Themes of Life and Levels of Biological Organization
Prepared by: Patricia S. Lacson, LPT
Grade Level: 11
Subject: General Science - Biology
Time Allotment: 2 Days (November 6 & 7, 2025)
Overview
Life on Earth is diverse and complex, yet all living things share unifying
characteristics and levels of organization that make them part of one
interconnected system. This module will help you understand how biological
themes link all forms of life and how these forms are organized — from the
smallest atom to the vast biosphere.
Learning Competencies
At the end of this module, you should be able to:
Identify and explain the unifying themes of life.
Describe the levels of biological organization from simplest to most complex.
Illustrate the relationship between these two concepts through a creative
diagram.
Lesson 1: Unifying Themes of Life
Life can be better understood through recurring ideas called unifying
themes. These explain how organisms interact, grow, reproduce, and adapt to
their environment.
The 10 Unifying Themes of Life:
1. Biological Systems – Life functions as organized systems, from cells to
ecosystems.
2. Cellular Basis of Life – All organisms are made of one or more cells.
3. Structure and Function – A body part’s structure is closely related to its
function.
4. Reproduction and Inheritance – Traits are passed from parents to offspring
through DNA.
5. Environmental Interactions – Organisms interact and respond to their
surroundings.
6. Energy and Life – Life processes require energy, usually derived from the sun.
7. Regulation (Homeostasis) – Organisms regulate internal conditions for
stability.
8. Evolution and Diversity – Organisms evolve and adapt, resulting in life’s
diversity.
9. Scientific Inquiry – Biologists explore and explain nature through observation
and experimentation.
