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Study Biology with these Free Learning Resources

Atoms and Molecules: Atom Model
An atom is the smallest particle of an element that contains the chemical properties of that element. Learn about atoms and their components (protons, neutrons, and electrons) in this program.
Atoms and Molecules: Chemical Formula Quiz: Organic Compounds
How well do you know the chemical formulas of organic molecules? Bond with this fun quiz -- ten questions randomly selected from our apothecary!
Keywords: Acetone, Acetylsalicylic Acid, Acridine, Apartic Acid, Ascorbic Acid, Asparagine, Atoms and Molecules, Atoms and Molecules: Chemical Formula Quiz: Organic Compounds, Atrophine, Barbituric Acid, Benzene, Biology, Butane, Butanol, Carbolic Acid, Carotene, Cellulose, chemical formula, Chemical Formula Quiz, Cholesterol, Deoxyribose, Ethene, Ferrocene, Glucose, Glycerol, Histamine, Hydrocortisone, Hydrogen Cyanide, Lactic Acid, Leucine, Lycopene, Lysine, Mallic Acid, Methane, Morphine, Nitroglycerine, Octane, Organic Compounds, Pentane, Progesterone, quiz, Ribose, Strychnine, Sucrose, Toluene, Valine, Vinyl Chloride
Atoms and Molecules: Chemical Symbol Lookup Table
This lookup displays all the elements in the periodic table, sorted by symbol. Also included are the element name, atomic mass, atomic number, and electron configuration. This is a must for anyone learning the periodic table.
Atoms and Molecules: Chemical Symbol Quiz
See how well you remember the chemical symbols with this quiz. At a button-click you get ten more names of elements from the periodic table, each with four choices of chemical symbols for you to choose. Can you get them all?
Atoms and Molecules: Electron Orbitals
Electron configuration in an atom is organized into orbitals and differently shaped subshells. Learn about the s subshell, p subshell, d subshell, and f subshell (and more) in this interactive tour.
Atoms and Molecules: Periodic Table
Examine chemical symbols, atomic masses, electronegativity, electron shell configuration, and more in this printable interactive periodic table of the elements. We have all the elements discovered thus far, and instructions on how to read the table.
Atoms and Molecules: Using The Periodic Table
Ever wonder how to actually use the periodic table of elements? Get a detailed overview of the various sections on the periodic table including electron shell configuration, atomic mass, chemical symbols, electronegativity, and more with this tutorial.
Cell Membranes: Active Transport
Active transport is the mediated process of moving molecules and other substances across membranes. Use this tutorial to learn about active transport, including such key terms as adenosine triphosphate (ATP), carrier mediated transport, and concentration gradients.
Cell Membranes: Carrier Proteins
Carrier proteins help specific molecules or ions pass through the plasma membrane. Do you know how carrier proteins work? This interactive tutorial will help you to absorb this key concept.
Keywords: Active Transport, ADP+P, Biology, Carrier Proteins, Cell Membranes, Cell Membranes: Carrier Proteins, Concentration Gradient, Exterior of Cell, Facilitated Diffusion, ion, K, molecules, Na, Na - K Pump, Passive Transport, Pump, Sodium Potassium Pump
Cell Membranes: Diffusion Through a Membrane
Diffusion is the net movement of particles (atoms, molecules, or ions) from a highly concentratd region to a region of low concentration. Understanding diffusion through a membrane is a key biology concept. Take this interactive tour to help you master the process and terminology.
Keywords: active, Atoms, Biology, cell, Cell Membranes, Cell Membranes: Diffusion Through a Membrane, Concentration gradient, Diffusion, Diffusion Through a Membrane, Equilibrium, gases, high Concentration, Ions, Low Concentration, Membrane, Molecules, Particles, passive, plasma membrane, Random Movement, solutions
Cell Membranes: Endocytosis
Endocytosis is a cellular process where cells absorb molecules or substances from outside the cell by engulfing it with the cell membrane. This tutorial explains the cellular processes involved in endocytosis, including phagocytosis, pinocytosis, and receptor-mediated endocytosis.
Keywords: Biology, Cell Membranes, Cell Membranes: Endocytosis, Endocytosis, exocytosis, hydrophobic plasma membrane, Phagocytosis, phagosome, Pinocytosis, receptor proteins, Receptor-Mediated Endocytosis, vacuole
Cell Membranes: Exocytosis
Exocytosis is the cellular process by which cells excrete waste products or chemical transmitters. Learn about this process in this tutorial.
Cell Membranes: Lipid Bilayer
The lipid bilayer is an organic compound that is insoluble in water but soluble in nonpolar solvents, providing the basic impermeable structure of the membrane. Explore the process, structure, and function of an plasma membrane's lipid bilayer with this interactive tutorial.
Keywords: Biology, Cell Membranes, Cell Membranes: Lipid Bilayer, E-Face, External Face, Fats, Hydrophilic, Hydrophobic, insoluble, Lipid, Lipid Bilayer, Lipid Structure, nonpolar, nonpolar solvent, P-Face, Phospholipids, Plasma membrane, Proteins, Protoplasmic Face, soluble
Cell Membranes: Membrane Proteins
How much do you know about the three types of membrane proteins? Find out about integral proteins, transmembrane proteins, and peripheral proteins with this interactive tutorial.
Keywords: Biology, Cell Membranes, Cell Membranes: Membrane Proteins, Hydrophilic, Hydrophobic, Integral, Lipid Bilayer, Membrane, Membrane Proteins, Peripheral, Proteins, Transmembrane, Transmembrane Protein
Cell Membranes: Osmosis in a Plant Cell
In biological terms, osmosis is the diffusion of water though a membrane to a region with a lower concentration of water. Do you understand how osmosis works in a plant cell? Take this interactive tour to help you master the concept and terminology.
Cell Membranes: Osmosis in an Animal Cell
In biological terms, osmosis is the diffusion of water though a membrane to a region with a lower concentration of water. Do you understand how osmosis works in an animal cell? Take this interactive tour to help you master the concept and terminology.
Cell Membranes: Passive Transport
Passive transport is the cellular process of moving molecules and other substances across membranes. Learn about diffusion, facilitated diffusion, filtration, and osmosis in this Passive Transport tutorial.
Cell Membranes: Plasma Membrane - Animal Cell
The plasma membrane is a selectively permeable membrane made up of a lipid bilayer and proteins surrounding the cell. Explore the process, structure, and function of an animal cell's plasma membrane with this interactive tutorial.
Keywords: Animal Cell, Biology, Cell, Cell Membranes, Cell Membranes: Plasma Membrane - Animal Cell, E-Face, External face, Hydrophilic, Hydrophobic, Impermeable Structure, Insoluble, Lipid Bilayer, Membrane Proteins, P-Face, Plasma Membrane, Plasma Membrane - Animal Cell, Proteins, Protoplasmic Face, Soluble
Cell Membranes: Plasma Membrane - Plant Cells
The plasma membrane is a selectively permeable membrane made up of a lipid bilayer and proteins surrounding the cell but inside the cell wall. Explore the process, structure, and function of a plant cell's plasma membrane with this interactive tutorial.
Keywords: Bacteria, Biology, Cell, Cell Membranes, Cell Membranes: Plasma Membrane - Plant Cells, Cell Wall, E-Face, External Face, Hydrophilic, Hydrophobic, Lipid Bilayer, Membrane Proteins, P-Face, Plant Cells, Plasma Membrane, Plasma Membrane - Plant Cells, Proteins, Protists, Protoplasmic Face
Cells: Animal Cell Cycle
Use this tutorial to explore the growth and division processes for animal cells.
Keywords: Anaphase, Animal Cell, Animal Cell Cycle, Biology, Cells, Cells: Animal Cell Cycle, centromeres, chromatids, chromosomes, Cytokinesis, cytoplasm, DNA, G1, G2, Interphase, Metaphase, metaphase plate, Mitosis, mitotic spindle, nuclear division, nuclear membrane, nuclei, Prophase, S, spindle fibers, synthesized, Telophase
Cells: Biology Quiz: Cells
Take this self-quiz to review cell terms and concepts like mitochondria, meiosis, and mitosis.
Keywords: Anaphase, Anaphase II, Animal Cell, Biology, Capsule, Cell Membrane, Cell Wall, Cells, Cells: Biology Quiz: Cells, Choroplast, Cytokinesis, Cytokinesis II, Cytoplasm, Diploid, Endoplasmic Reticulum, Fimbrium, Flagella, G2 Phase, Golgi Complex, Haploid, Interkinesis, Interphase, Lysosomes, Meiosis, Meiosis I, Meiosis II, Metaphase, Metaphase II, Mitosis, Nucleolus, Nucleus, Peroxisomes, Phagocytes, Pilus, Plant Cell, Prokaryote, Prophase, Prophase II, Quiz, Ribosomes, S Phase, Telophase, Telophase II, Vacuoles
Cells: Inside a Plant Cell
Examine the structures and function of the plant cell with this interactive illustration.
Cells: Inside a Prokaryote
Examine the structures and function of a prokaryote with this interactive illustration.
Keywords: bacteria, Biology, blue-green algae, Capsule, Cell Membrane, Cell Wall, Cells, Cells: Inside a Prokaryote, cytoplasm, DNA, flagella, Inside a Prokaryote, membrane-bound organelles, organelles, organisms, Pilus, Prokaryote, ribosomes, single cell
Cells: Inside an Animal Cell
Examine the structures and function of the animal cell with this interactive illustration.
Keywords: Animal Cell, Biology, Cell Membrane, Cells, Cells: Inside an Animal Cell, Cytoplasm Peroxisomes, Endoplasmic Reticulum, Golgi Complex, Inside an Animal Cell, Lysosomes, Mitochondrion, Nucleus, Vacuole
Cells: Plant Cell Cycle
Use this tutorial to explore the growth and division processes for plant cells -- interphase, mitosis, prophase, metaphase, anaphase, telophase, and cytokinesis.
Human Anatomy: Biology Quiz: The Human Body
How well do you know your body? Try your hand with this fun quiz -- ten questions randomly selected from our vast collection!
Keywords: Addison's Disease, Agglutinate, Alveolus, Anus, Anvil, Aorta, Appendicular Skeleton, Associative, Biology, Biology Quiz, Biology Quiz: The Human Body, Body, Capillaries, Cerebrum, Cervical Vertebrae, Clavicle, Cone, Conjunctiva, Coronary Throbosis, Dendrite, Diabetes, Femur, Fibula, Gallstones, Hammer, Human Anatomy, Human Anatomy: Biology Quiz: The Human Body, Hypertension, Interneurons, Isles of Langerhans, Liver, Midbrain, Nasal Septum, Parathyroid Gland, Patella, Pepsin, Phalanges, Pharynx, Pineal Gland, Pleurisy, Pons, Posterior Pituitary Gland, Radius, Respiration, Retina, Right Ventricle, Rod, Sternum, Stirrup, Stomach, Taste Buds, Tetany, The Human Body, Throat, White Blood Cells
Human Anatomy: Inside the Human Brain
Examine the structures and function of the human brain with this interactive illustration.
Keywords: Anatomy, Biology, Brain, Cerebellum, Cerebral Cortex, Corpus Callosum, Human Anatomy, Human Anatomy: Inside the Human Brain, Human Brain, Hypothalamus, Inside the Human Brain, Medulla Oblongata, Midbrain, Pons, Spinal Cord, Thalamus
Human Anatomy: Inside the Human Ear
Examine the structures and function of the human ear with this interactive illustration.
Keywords: Auditory Nerve, Auricle, Biology, Cartilage, Cochlea, Ear, Earlobe, Eustacian Tube, Human Anatomy, Human Anatomy: Inside the Human Ear, Inside the Human Ear, Middle Earth, Muscle, Ossicles, Outer Auditory Canal, Oval Window, Semicircular Canals, Temporal Bone, Tympanic membrane
Human Anatomy: Inside the Human Eye
Examine the structures and function of the human eye with this interactive illustration.
Keywords: Aqueous Humor, Biology, Chorid, Ciliary Body, Conjunctiva, Cornea, Eye, Human Anatomy, Human Anatomy: Inside the Human Eye, Inside the Human Eye, Iris, Lens, Retina, Sclera, Vitreous Humor
Human Anatomy: Inside the Human Heart
Examine the structures and function of the human heart with this interactive illustration.
Keywords: A-V Node, Aorta, Biology, Cardiac Septum, Heart, Human Anatomy, Human Anatomy: Inside the Human Heart, Inferior Vena Cava, Inside the Human Heart, Left Atrium, Left Ventricle, Myocardium, Pulmonary Artery, Right Atrium, Right Ventricle, SA Node, Superior Vena Cava
Human Anatomy: Inside the Human Skin
Examine the structures and function of the human skin with this interactive illustration.
Keywords: Basal Cell Layer, Biology, Blood Vessel Dermis, Granular Cell Layer, Hair Follicle, Human Anatomy, Human Anatomy: Inside the Human Skin, Inside the Human Skin, Nerves, Skin, Spinous layer, Stratum Corneum, Subcutaneous fat, Sweat Duct, Sweat Gland, The Erector Pili Muscle
Human Anatomy: Inside the Human Urinary System
Examine the structures and function of the human urinary system with this interactive illustration.
Keywords: Adrenal Gland, Aorta, Biology, Human Anatomy, Human Anatomy: Inside the Human Urinary System, iliac vein, iliac veins, Inferior Vena Cava, Inside the Human Urinary System, Kidney, Left Kidney, Renal Artery, Renal vein, Right Kidney, Ureter, Urinary Bladder, Urinary System
Miscellaneous: My Biology Flashcards
Learn the important terms and definitions for biology with these flashcards. You can even study while you play a concentration game, too!
Keywords: Acid, Acrasiomycota, Aerobic Respiration, Amphibia, Anaerobic Respiration, Annelida, Arachnida, Arthropoda, Atomic Mass, Atomic Number, Aves, Base, Basidiomycota, Biology, Bryophyta, Carbohydrate, Cell Membrane, Cell Wall, Cellulose, Chemical Equation, Chemical Formula, Chemical Reaction, Chilopoda, Chlorophyll, Chloroplast, Chordata, Ciliates, Covalent Bond, Cytokinesis, Diatomic Molecule, DNA, Electron, Empirical Formula, Eukaryote, Exocytosis, Flagella, Flashcards, Golgi Body, Ion, Ionic Bond, Isotope, Lipid, Lysosome, Miscellaneous, Miscellaneous: My Biology Flashcards, Mitochondrion, Mitosis, My Biology Flashcards, Neutron, Nucleolus, Nucleus, Organic Compound, Periodic Table, Peroxisome, Phagocytosis, Photosynthesis, Pinocytosis, Plasmolysis, Prokaryote, Protein, Proton, Ribosome, Vacuole
Student Content: My Genetics and Ecology Flash Cards
Flashcards are a great way to learn biology terms. These flash cards include terms associated with genetics and ecology.
Keywords: allele, biosphere, Claire, community, ecology, ecosystem, flash cards, flashcards, food chain, food web, gene, genetics, genotype, habitat, heredity, karyotype, mutation, nucleotide, phenotype, student content, trait, variation

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