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Biology 101: Intro to Biology

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Updated November 10, 2022

Course Summary

Biology 101: Intro to Biology has been evaluated and recommended for 3 semester hours, which may be transferred to over 2,000 colleges and universities. The course can be completed at your own pace, and it offers you a convenient, inexpensive and simple way to jumpstart your degree program.

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Lesson Sample

Science Vocabulary & Concepts: Study Skills & Word Parts

Biology 101: Intro to Biology 184K views 9 min

About this course:

18 hours of educational videos

172 self-paced lessons

22 practice tests

3 transferable credit hours

Expert Contributor: April Koch

April teaches high school science and holds a master's degree in education.

24 chapters in Biology 101: Intro to Biology

Course Practice Test

Check your knowledge of this course with a 50-question practice test.
  • Comprehensive test covering all topics
  • Detailed video explanations for wrong answers
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Course Progress Best Score
Cellular Respiration: Energy Transfer in Cells Video  Take Quiz
Redox Reactions & Electron Carriers in Cellular Respiration: Definitions and Examples Video  Take Quiz
Glycolysis Pathway: Steps, Products & Importance Video  Take Quiz
The Citric Acid (Krebs) Cycle: Products and Steps Video  Take Quiz
The Electron Transport Chain: Products and Steps Video  Take Quiz
Lactic Acid & Alcoholic Fermentation: Comparison, Contrast & Examples Video  Take Quiz
Chlorophyll: Absorbing Light Energy for Photosynthesis Video  Take Quiz
Photolysis and the Light Reactions: Definitions, Steps, Reactants & Products Video  Take Quiz
Dark Reactions of Photosynthesis: The Calvin-Benson Cycle Video  Take Quiz
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Basic Genetics: The Genome & Chromosomes Video  Take Quiz
How is DNA Organized into Chromosomes? - Structure & Function Video  Take Quiz
The Cell Cycle: Definition, Phases & Sequence Video  Take Quiz
How is DNA Packaged? - Chromosome Condensation & Karyograms Video  Take Quiz
Parts of a Chromosome & Their Roles Video  Take Quiz
Mitotic Spindle: Definition, Formation & Function Video  Take Quiz
Stages of Mitosis: Description & Sequence Video  Take Quiz
Cytokinesis: Animal Versus Plant Cells Video  Take Quiz
Asexual vs. Sexual Reproduction: Comparison & Characteristics Video  Take Quiz
Meiosis: Comparison to Mitosis, Crossing Over & Process Video  Take Quiz
Meiosis I Stages: Prophase I, Metaphase I, Anaphase I & Telophase I Video  Take Quiz
Meiosis II: Definition, Stages & Comparison to Meiosis I Video  Take Quiz
Nondisjunction & Aneuploidy: Definition & Examples Video  Take Quiz
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What is Bacteria? - Definition & Types Video  Take Quiz
Archaea & Bacteria: Similarities & Differences Video  Take Quiz
Bacterial Cell Morphology and Classification: Definition, Shapes & Arrangements Video  Take Quiz
Types of Bacteria Found in Anaerobic Environments Video  Take Quiz
Bacterial Cell Walls: Structure, Function & Types Video  Take Quiz
Protist Cell Structure Video  Take Quiz
Protist Life Cycle Text Lesson  Take Quiz
Heterotrophic Protists: Feeding Mechanism, Characteristics & Reproduction Text Lesson  Take Quiz
Colonial Protists: Definition & Examples Text Lesson  Take Quiz
Common Freshwater Protists Text Lesson  Take Quiz
Examples of Unicellular Protists Video  Take Quiz
3 Methods of Protist Locomotion Video  Take Quiz
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Course Progress Best Score
Botany in the 17th & 18th Centuries Text Lesson  Take Quiz
The Plant Stem: Function, Types & Parts Video  Take Quiz
Structure of Plant Stems: Vascular and Ground Tissue Video  Take Quiz
Primary Root Tissue, Root Hairs and the Plant Vascular Cylinder Video  Take Quiz
Root System Growth: The Root Cap, Primary Roots & Lateral Roots Video  Take Quiz
Plant Hormones: Chemical Control of Growth and Reproduction Video  Take Quiz
Tropisms: Phototropic, Geotropic and Thigmotropic Plant Growth Video  Take Quiz
Structure of Leaves: The Epidermis, Palisade and Spongy Layers Video  Take Quiz
Life Cycles of Different Types of Plants Text Lesson  Take Quiz
An Angiosperm Life Cycle: Flowering Plant Reproduction Video  Take Quiz
What is Seed Germination? - Definition, Process, Steps & Factors Video  Take Quiz
Asexual Plant Reproduction: Vegetative Propagation and Bulbs Video  Take Quiz
Homeostasis in Plants Video  Take Quiz
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The Environment, Levels of Ecology and Ecosystems Video  Take Quiz
Ecosystems, Habitats and Ecological Niches Video  Take Quiz
Food Chains, Trophic Levels and Energy Flow in an Ecosystem Video  Take Quiz
Interspecific Competition, Competitive Exclusion & Niche Differentiation Video  Take Quiz
Predator/Prey Interactions, Camouflage, Mimicry & Warning Coloration Video  Take Quiz
Symbiotic Relationships: Mutualism, Commensalism & Parasitism Video  Take Quiz
Populations: Density, Survivorship and Life Histories Video  Take Quiz
Survivorship Curve: Types & Examples Video  Take Quiz
Carrying Capacity, Migration & Dispersion Video  Take Quiz
Ecological Succession: From Pioneer to Climax Communities Video  Take Quiz
How Introduced and Invasive Species Alter Ecological Balance Video  Take Quiz
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Practice Tests in this course
Check your knowledge of this course with a 50-question practice test. Once you take the test, you will receive a detailed exam report complete with your personal statistics and even specific lessons to focus on! Take the practice test now
Your detailed study guide will include:
  • Answers and detailed explanations to each question
  • Video lessons to explain complicated concepts
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