An Introduction to Biology

The key to understanding biology is a solid foundation in its most basic concepts. These resources will introduce you to basic biology principles so you can move on to more complex topics.

  • Steps of the scientific method
    Scientific Method Example
  • Diagram showing the process of glycolysis
    Glycolysis Steps
  • Humans and other vertebrate show cephalization.
    Cephalization: Definition and Examples
  • Animals Competing for Resources
    What Is Resource Partitioning? Definition and Examples
  • Carolus Linnaeus
    Taxonomy and Organism Classification
  • Computer illustration of a DNA Polymerase molecule
    Biology Prefixes and Suffixes: -ase
  • Digital illustration of the Human Digestive System
    Organ Systems Study Guide
  • man and woman walk together on the beach
    Why Men Are Typically Taller Than Women
  • Young college students in class
    How To Take Good Biology Notes
  • The wood tick is an example of an ectoparasite.
    Parasitism: Definition and Examples
  • Close up of white and orange tigers lounging in grass.
    6 Things You Should Know About Biological Evolution
  • Diffusion: Passive Transport and Facilitated Diffusion
  • Male and Female Hormones
    How Steroid Hormones Work
  • Moon Jellyfish
    Biology: The Study of Life
  • Methanococcoides Archaea
    Archaea Domain
  • Helicobacter pylori
    Bacteria: Friend or Foe?
  • Thin Horses
    Biology Prefixes and Suffixes: -troph or -trophy
  • Tongue Bacteria
    Differences Between Bacteria and Viruses
  • celldivision.jpg
    3 Types of Sexual Life Cycles
  • Energy and Thermodynamics
    Laws of Thermodynamics as Related to Biology
  • Cytoskeleton
    Frequently Asked Biology Questions and Answers
  • Red Blood Cells in Bloodstream
    12 Interesting Facts About Blood
  • Focused high school student microscope listening science classroom
    How to Format a Biology Lab Report
  • Cicada Exoskeleton
    Biology Prefixes and Suffixes: Ex- or Exo-
  • T4 Bacteriophage
    7 Facts About Bacteriophages
  • Tree Bark Split
    Peri Prefix Meaning in Biology
  • Evolution of life
    Levels of Taxonomy Used in Biology
  • Influenza Virus (H1N1)
    7 Facts About Viruses
  • Anaphase I For Bluebell
    Biology Prefixes and Suffixes: ana-
  • Erythrocytes (Red Blood Cells)
    Biology Prefixes and Suffixes: Erythr- or Erythro-
  • Phlebotomist taking a blood sample from patient
    Biology Suffix Definition: -otomy, -tomy
  • Blood Clot
    Biology Prefixes and Suffixes: hem- or hemo- or hemato-
  • Hand sanitizer
    Do Hand Sanitizers Work Better Than Soap and Water?
  • Influenza Virus Particles
    Anatomy and Structure of Viruses
  • Brome Mosaic Virus - Plant
    How Plant Viruses, Viroids, and Satellite Viruses Cause Disease
  • Bigfin Reef Squid
    Biology Prefixes and Suffixes: Cephal-, Cephalo-
  • High School Students in Biology Class
    How To Study for Biology Exams
  • Algae in a Lake
    Understanding the Definition of the "Auto" Prefix in Biology
  • Downs syndrome karyotype, illustration
    Karyo- or Caryo- Biology Prefixes and Suffixes
  • Influenza Virus Particle
    Learn How Virus Replication Occurs
  • Spitting Cobra
    Biology Prefixes and Suffixes: Ect- or Ecto-
  • Heap of Sugar Cubes
    Biology Prefixes and Suffixes: glyco-, gluco-
  • Student working at desk in library
    Basic Tips to Ace Your Biology Class
  • Skeletal Muscle Fiber
    Biology Prefixes and Suffixes: My- or Myo-
  • Water Bear
    Biology Prefixes and Suffixes: -Phile, -Philic
  • Cancer Cell Metastasis
    Biology Prefixes and Suffixes: -stasis
  • Skin Cells
    Biology Prefixes and Suffixes: Derm- or -Dermis
  • Cheetah Licking
    Biology Prefixes and Suffixes: Zoo- or Zo-
  • Atherosclerosis
    Biology Prefixes and Suffixes: -Osis, -Otic
  • Cranial Nerves
    The Names, Functions, and Locations of Cranial Nerves
  • Osteoporosis
    Biology Prefixes and Suffixes: -penia
  • Gonorrhea Bacterium
    Biology Prefixes and Suffixes: diplo-
  • Arthritis X-ray
    Biology Prefixes and Suffixes: arthr- or arthro-
  • closeup of hands on dictionary
    Biology Prefixes and Suffixes Index
  • Mesothelium
    Biology Prefixes and Suffixes: meso-
  • Biology Students
    Biology Homework Help
  • Pollen in Wind
    Biology Prefixes and Suffixes: Aer- or Aero-
  • Brain White Matter
    White Matter and Your Brain
  • Kidney Dialysis
    The Biology Suffix -lysis
  • High school students using a microscope
    What Is AP Biology?
  • Epidermis (skin surface). This is a colored scanning electron micrograph (SEM) of the surface of the skin of a 6-year-old. The outermost surface of the epidermis is composed of dead and dying skin cells from the underlying epidermis, which help to protect the delicate epidermal cells from the external environment.
    Biology Prefixes and Suffixes: epi-
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