cK-12 Biology Flexbook – Honeycutt Science

cK12 Biology 1 – flexbook

This page offers convenient access to cK-12.org Biology I flexbook. While the cK-12 chapters do not always directly correspond Honeycutt Science topic numbers, our site’s topic IDs are presented as convenient hyperlinks in italics following the cK-12 chapter name.

For example: Chapter 4 (Photosynthesis) and Topic 15 (Plant Cells) cover similar content, but they are only complementary – not identical. In this example, both include distinctions of plant cells compared to animal cells. But, Chapter 4 describes and illustrates how chloroplasts convert light energy to chemical energy, whereas topic 15 does not dive into those details. Conversely, Topic 15 includes discussion and concepts of bio-engineering in plants. Chapter 4 does not mention bio-engineering. Together, Chapter 4 and Topic 15 provide similar and complementary content with duplication only in the most significant areas.

Note: If printed, the 26 chapters (pdf files below) from cK-12 Biology flexbook contain 1,391 total pages. For comparison, most commercially available high school biology text books have less than 1,000 total pages. Chapters 1-18 plus the Appendix cover content in a typical high school Biology textbook. Chapters 19-25 cover content typically available in an introduction to physiology/anatomy (an upper-level high school life sciences course).

CAUTION: The pdf file attachments provided below are very large. They may take several seconds to several minutes to download. For users concerned about data-usage or data charges, these files may not be appropriate for downloading. Approximate file size for each chapter is provided at the bottom of this page.

cK12 Index – cK12 Original Index (biology topics)
Chapter 01 – Foundations of Science (11, 12, 28)
Chapter 02 – Chemical Basis of Life (25)
Chapter 03 – Cell Structure and Function (14)
Chapter 04 – Photosynthesis (15)
Chapter 05 – Cellular Respiration (44)
Chapter 06 – Cell Division and Reproduction (17)
Chapter 07 – Mendelian Genetics (18)
Chapter 08 – Molecular Genetics (19)
Chapter 09 – Human Genetics (45)
Chapter 10 – Biotechnology (41)
Chapter 11 – History of Life (16)
Chapter 12 – Evolutionary Theory (24, 31)
Chapter 13 – Evolution in Populations (26, 27)
Chapter 14 – Classification (21, 33)
Chapter 15 – Principles of Ecology (23, 35)
Chapter 16 – Biomes Ecosystems and Communities (46)
Chapter 17 – Populations (22, 32)
Chapter 18 – Ecology and Human Actions (43, 47)
Chapter 19 – The Human Body (42)
Chapter 20 – Nervous and Endocrine Systems (42)
Chapter 21 – Skeletal Muscular and Integumentary Systems (42)
Chapter 22 – Circulatory and Respiratory Systems (42)
Chapter 23 – Digestive and Excretory Systems (42)
Chapter 24 – Immune System and Disease (42)
Chapter 25 – Reproductive System and Human Development (42)
Chapter 26 – Appendix (34, 36)

Approximate file size (megabytes) of each chapter

Chapter 01 – Foundations of Science.pdf…..(5.7 megabytes)
Chapter 02 – Chemical Basis of Life.pdf…..(2.7 megabytes)
Chapter 03 – Cell Structure and Function.pdf…..(5.7 megabytes)
Chapter 04 – Photosynthesis.pdf…..(4.6 megabytes)
Chapter 05 – Cellular Respiration.pdf…..(4.3 megabytes)
Chapter 06 – Cell Division and Reproduction.pdf…..(1.7 megabytes)
Chapter 07 – Mendelian Genetics.pdf…..(3.9 megabytes)
Chapter 08 – Molecular Genetics.pdf…..(5.2 megabytes)
Chapter 09 – Human Genetics.pdf…..(1.1 megabytes)
Chapter 10 – Biotechnology.pdf…..(1.8 megabytes)
Chapter 11 – History of Life.pdf…..(4.6 megabytes)
Chapter 12 – Evolutionary Theory.pdf…..(4.3 megabytes)
Chapter 13 – Evolution in Populations.pdf…..(9.8 megabytes)
Chapter 14 – Classification.pdf…..(12.1 megabytes)
Chapter 15 – Principles of Ecology.pdf…..(4.1 megabytes)
Chapter 16 – Biomes Ecosystems and Communities.pdf…..(20.1 megabytes)
Chapter 17 – Populations.pdf…..(3 megabytes)
Chapter 18 – Ecology and Human Actions.pdf…..(6.5 megabytes)
Chapter 19 – The Human Body.pdf…..(0.8 megabytes)
Chapter 20 – Nervous and Endocrine Systems.pdf…..(3.5 megabytes)
Chapter 21 – Skeletal Muscular and Integumentary Systems.pdf…..(4.3 megabytes)
Chapter 22 – Circulatory and Respitory Systems.pdf…..(2.4 megabytes)
Chapter 23 – Digestive and Excretory Systems.pdf…..(1.5 megabytes)
Chapter 24 – Immune System and Disease.pdf…..(0.9 megabytes)
Chapter 25 – Reproductive System and Human Development.pdf…..(1.4 megabytes)
Chapter 26 – Appendix.pdf…..(0.4 megabytes)

CK-12 Foundation is a non-profit organization with a mission to reduce the cost of textbook materials for the K-12 market both in the U.S. and worldwide. Using an open-content, web based collaborative model termed the “FlexBook,” CK-12 intends to pioneer the generation and distribution of high quality educational content that will serve both as core text as well as provide an adaptive environment for learning. Copyright ©2009 CK-12 Foundation This work is licensed under the Creative Commons Attribution-Share Alike 3.0 United States License.

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