R E B O OT C O M PU T E R S E RVI C ES I N C . · C O L L E G E ST U DY S E R I ES
Biology 101
The Complete Study Guide to Introductory Biology
Concepts · Diagrams in Words · Practice + Answers
Inside this guide
1 · The Nature of Life & the Scientific Method
2 · The Chemistry of Life
3 · Cells: Structure & Function
4 · Energy: Photosynthesis & Respiration
5 · Cell Division & Genetics
6 · DNA, RNA & Protein Synthesis
7 · Evolution & Ecology
8 · Quick Reference
9 · Practice Questions with Answers
10 · Glossary
A self-study companion for introductory biology · rebootcs.com
, 1 · The Nature of Life & the Scientific Method
Biology is the study of living things. All organisms share key characteristics: they are organized into cells, use energy
(metabolism), maintain internal balance (homeostasis), grow and develop, respond to stimuli, reproduce, and evolve
over generations.
Levels of Organization
From smallest to largest: atoms → molecules → organelles → cells → tissues → organs → organ systems → organism
→ population → community → ecosystem → biosphere.
The Scientific Method
Observation → question → hypothesis (a testable, falsifiable explanation) → prediction → controlled experiment →
analysis → conclusion. A good experiment has an independent variable (what you change), a dependent variable
(what you measure), and controls to isolate the effect.
© Reboot Computer Services Inc. · Created by Mario Washington · Page 2 of 12
Biology 101
The Complete Study Guide to Introductory Biology
Concepts · Diagrams in Words · Practice + Answers
Inside this guide
1 · The Nature of Life & the Scientific Method
2 · The Chemistry of Life
3 · Cells: Structure & Function
4 · Energy: Photosynthesis & Respiration
5 · Cell Division & Genetics
6 · DNA, RNA & Protein Synthesis
7 · Evolution & Ecology
8 · Quick Reference
9 · Practice Questions with Answers
10 · Glossary
A self-study companion for introductory biology · rebootcs.com
, 1 · The Nature of Life & the Scientific Method
Biology is the study of living things. All organisms share key characteristics: they are organized into cells, use energy
(metabolism), maintain internal balance (homeostasis), grow and develop, respond to stimuli, reproduce, and evolve
over generations.
Levels of Organization
From smallest to largest: atoms → molecules → organelles → cells → tissues → organs → organ systems → organism
→ population → community → ecosystem → biosphere.
The Scientific Method
Observation → question → hypothesis (a testable, falsifiable explanation) → prediction → controlled experiment →
analysis → conclusion. A good experiment has an independent variable (what you change), a dependent variable
(what you measure), and controls to isolate the effect.
© Reboot Computer Services Inc. · Created by Mario Washington · Page 2 of 12
