AP Biology: Homework Help Resource

Course Summary

Mastering the subjects taught in your AP biology course is simple with our fun AP Biology: Homework Help course. Simply choose which video lessons to watch, take the assessment quizzes to test your understanding, and work towards a better score on your difficult homework assignments.
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27 chapters in AP Biology: Homework Help Resource

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
Lesson 1 - How a Phospholipid Bilayer Is Both Hydrophobic and Hydrophilic  Take Quiz
Lesson 2 - The Fluid Mosaic Model of the Cell Membrane  Take Quiz
Lesson 3 - Passive Transport in Cells: Simple and Facilitated Diffusion & Osmosis  Take Quiz
Lesson 4 - Active Transport in Cells: Definition & Examples  Take Quiz
Lesson 5 - Endocytosis and Exocytosis Across the Cell Membrane  Take Quiz
Lesson 6 - Structure of the Nucleus: Nucleolus, Nuclear Membrane, and Nuclear Pores  Take Quiz
Lesson 7 - The Ribosome: Structure, Function and Location  Take Quiz
Lesson 8 - The Endomembrane System: Functions & Components  Take Quiz
Lesson 9 - The Cytoskeleton: Microtubules and Microfilaments  Take Quiz
Lesson 10 - Mitochondria Structure: Cristae, Matrix and Inner & Outer Membrane  Take Quiz
Lesson 11 - Chloroplast Structure: Chlorophyll, Stroma, Thylakoid, and Grana  Take Quiz
Lesson 12 - Plant Cell Structures: The Cell Wall and Central Vacuole  Take Quiz
Lesson 13 - Eukaryotic and Prokaryotic Cells: Similarities and Differences  Take Quiz
Lesson 14 - Viruses: Bacteriophage Lytic and Lysogenic Cycles  Take Quiz
Lesson 15 - Cytosol: Definition, Function & Structure  Take Quiz
Lesson 16 - Intracellular: Definition & Structures  Take Quiz
Lesson 17 - Lysozyme: Definition, Function & Structure  Take Quiz
Lesson 18 - Microvilli: Definition & Function  Take Quiz
Lesson 19 - What is a Stem Cell? - Definition, Uses & Research Facts  Take Quiz
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Course Progress Best Score
Lesson 1 - Classification of Vascular, Nonvascular, Monocot & Dicot Plants  Take Quiz
Lesson 2 - Structure of Plant Stems: Vascular and Ground Tissue  Take Quiz
Lesson 3 - Apical Meristem & Primary Shoot System Growth  Take Quiz
Lesson 4 - Lateral Meristem & Secondary Shoot System Growth  Take Quiz
Lesson 5 - Structure of Leaves: The Epidermis, Palisade and Spongy Layers  Take Quiz
Lesson 6 - Primary Root Tissue, Root Hairs and the Plant Vascular Cylinder  Take Quiz
Lesson 7 - Root System Growth: The Root Cap, Primary Roots & Lateral Roots  Take Quiz
Lesson 8 - Nitrogen Fixation: Significance to Plants and Humans  Take Quiz
Lesson 9 - Xylem: The Effect of Transpiration and Cohesion on Function  Take Quiz
Lesson 10 - Phloem: The Pressure Flow Hypothesis of Food Movement  Take Quiz
Lesson 11 - Flowers: Structure and Function of Male & Female Components  Take Quiz
Lesson 12 - Methods of Pollination and Flower-Pollinator Relationships  Take Quiz
Lesson 13 - C4 Plants: Definition, Types & Examples  Take Quiz
Lesson 14 - Cambium: Definition & Function  Take Quiz
Lesson 15 - Plant Meristem: Definition & Function  Take Quiz
Lesson 16 - Primary Consumers: Definition & Examples  Take Quiz
Lesson 17 - Rhizomes: Definition & Examples  Take Quiz
Lesson 18 - Short-Day Plants: Examples & Explanation  Take Quiz
Lesson 19 - Turgor Pressure in Plants: Definition & Overview  Take Quiz
Lesson 20 - What is Lichen Planus? - Causes, Symptoms & Treatment  Take Quiz
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Course Progress Best Score
Lesson 1 - Male Reproductive System: Functions, Organs & Anatomy  Take Quiz
Lesson 2 - Male Reproductive System: Accessory Gland Functions  Take Quiz
Lesson 3 - Testicular Anatomy: Structure, Terms & Diagrams  Take Quiz
Lesson 4 - Male Reproductive System: External Anatomy  Take Quiz
Lesson 5 - Sperm's Journey from the Testes to Urethral Orifice  Take Quiz
Lesson 6 - The HPG Axis: Hormones of Male Reproduction  Take Quiz
Lesson 7 - Female Reproductive System: Internal Anatomy  Take Quiz
Lesson 8 - The Uterus and Uterine Wall: Structure and Parts  Take Quiz
Lesson 9 - External Anatomy of the Female Reproductive System  Take Quiz
Lesson 10 - HPG Axis: Hormonal Control of the Ovarian Cycle  Take Quiz
Lesson 11 - Phases of The Ovarian Cycle: Overview from Puberty to Menopause  Take Quiz
Lesson 12 - Follicular Phase of the Ovarian Cycle  Take Quiz
Lesson 13 - Luteal Phase of the Ovarian Cycle  Take Quiz
Lesson 14 - The Uterine Cycle: Phases and Endometrial Changes  Take Quiz
Lesson 15 - The Uterine Cycle: Menses  Take Quiz
Lesson 16 - The Uterine Cycle: Proliferative Phase  Take Quiz
Lesson 17 - The Uterine Cycle: Secretory Phase  Take Quiz
Lesson 18 - The Female Reproductive Axis: Coordination of the Brain, Ovaries & Uterus  Take Quiz
Lesson 19 - Ovulation to Implantation: Oocyte's Path through Uterine Tubes  Take Quiz
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Course Progress Best Score
Lesson 1 - The Environment, Levels of Ecology and Ecosystems  Take Quiz
Lesson 2 - Ecosystems, Habitats and Ecological Niches  Take Quiz
Lesson 3 - Food Chains, Trophic Levels and Energy Flow in an Ecosystem  Take Quiz
Lesson 4 - Interspecific Competition, Competitive Exclusion & Niche Differentiation  Take Quiz
Lesson 5 - Predator/Prey Interactions, Camouflage, Mimicry & Warning Coloration  Take Quiz
Lesson 6 - Symbiotic Relationships: Mutualism, Commensalism & Parasitism  Take Quiz
Lesson 7 - Populations: Density, Survivorship and Life Histories  Take Quiz
Lesson 8 - Carrying Capacity, Migration & Dispersion  Take Quiz
Lesson 9 - Dispersal, Colonization, and Island Biogeography  Take Quiz
Lesson 10 - Conservation Biology, Habitat Fragmentation, and Metapopulations  Take Quiz
Lesson 11 - Ecological Succession: From Pioneer to Climax Communities  Take Quiz
Lesson 12 - How Introduced and Invasive Species Alter Ecological Balance  Take Quiz
Lesson 13 - Biomes: Desert, Tropical Rainforest, Savanna, Coral Reefs & More  Take Quiz
Lesson 14 - Biomes: Tundra, Taiga, Temperate Grassland, and Coastlines  Take Quiz
Lesson 15 - Biogeochemical Cycling and the Phosphorus Cycle  Take Quiz
Lesson 16 - The Nitrogen Cycle, Acid Rain and Fossil Fuels  Take Quiz
Lesson 17 - Fossil Fuels, Greenhouse Gases, and Global Warming  Take Quiz
Lesson 18 - The Carbon Cycle and Long-Term Carbon Storage  Take Quiz
Lesson 19 - Human Impacts on the Environment  Take Quiz
Lesson 20 - Estuaries Biome: Definition, Types & Climate  Take Quiz
Lesson 21 - Mutualism: Examples & Definition  Take Quiz
Lesson 22 - What Are Wetlands? - Definition & Types  Take Quiz
Lesson 23 - How Is Biotic Potential Determined?  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
Course Practice Test
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