Free Biology Resources & Activities
Welcome to Biology Contest
Unlock the wonders of life through knowledge, exploration, and fun. Test your biology expertise with our quizzes, articles, and activities — built for curious learners of every level.
Explore by topic
Six clusters spanning every scale of life
From the molecules inside a cell to the ecosystems that span the planet. Pick a thread.
DNA, CRISPR, gene editing, and the ethics of reshaping life.
Ecosystems, biodiversity, marine biology, climate change.
Cell biology, microbes, viruses, and the gut microbiome.
Organ systems, the brain, memory, aging, and your DNA.
Natural selection, mass extinctions, photosynthesis.
Myths, experiments, careers, quiz tips, Nobel laureates.
Start here
Three pages, one weekend
If you're new to biology, start with the orientation pages. They explain what the field covers, how it's organized, and the vocabulary you'll keep meeting.
What Is Biology?
Plain-English orientation to the field — what it studies, why it matters, where to start.
Branches of Biology
A field-by-field tour — molecular, cellular, evolutionary, ecological, applied.
Biology Glossary
Quick definitions — every term you'll keep meeting, with links to the deep articles.
Featured reading
Recent articles
Mass Extinctions: Life's Great Resets
Five times in Earth's history, the majority of all living species have been wiped out in a geologically brief moment. Mass extinctions reshape the biosphere — and recovery from them looks different every time. A guide to the Big Five, what caused them, and why some scientists think we're in the middle of a sixth.
Mitosis and Meiosis: How Cells Divide
Mitosis copies a cell. Meiosis halves it. The two kinds of cell division do completely different jobs in your body — one builds and repairs, the other makes the eggs and sperm that pass DNA to the next generation. A plain-English walkthrough of how each one works.
Natural Selection Explained: How Species Change
Natural selection is the mechanism Darwin proposed to explain how species change over time — and it remains the central organizing idea of all modern biology. A walkthrough of what it actually is, what it isn't, and how it works in real populations today.
More from the library
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Biology The Brain and How Memory Works
Memory is one of the central mysteries of biology — how a network of cells in your skull stores experience and lets you call it back. A walkthrough of the major types of memory, the brain regions that handle them, and what current neuroscience knows about how it all actually works.
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Biology The Gut Microbiome: Your Inner Ecosystem
You're carrying around about 38 trillion microbes — roughly the same number as cells in your own body. They live mostly in your gut, and they do real work on your behalf every day. A guide to the gut microbiome and why it matters.
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10 Common Biology Myths Debunked
Biology is a field that touches every part of our lives — from how our bodies work to how ecosystems thrive. But along the way, plenty of myths have taken…
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10 Fun Biology Experiments You Can Try at Home
Biology is all around us, in every breath we take and every living thing we see. One of the best ways to understand it is through hands-on exploration. You…
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Biodiversity Hotspots: Protecting Earth’s Most Vital Regions
The Earth is home to an astonishing variety of life, from the tiniest microorganisms to towering trees and majestic animals. But this rich web of life isn’t…
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Biology Quiz Tips: How to Ace Your Next Challenge
Whether it’s a quick classroom quiz or a big exam, biology tests can feel overwhelming with their mix of terms, processes, and concepts. But with the right…
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Biomimicry: How Nature Inspires Innovation
Nature has been solving problems for billions of years. Long before humans built airplanes, created adhesives, or designed energy-efficient buildings,…
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Careers in Biology: From Research to Conservation
For those who love asking “why” and “how,” research is at the heart of biology. Biomedical researchers work to understand diseases and develop new…
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CRISPR: Revolutionizing the Future of Medicine and Genetics
In the world of modern science, few discoveries have generated as much excitement—or as many questions—as CRISPR. Over the past decade, this powerful…
by BiologyContest
About us
About Biology Contest
Biology Contest is your ultimate destination for challenging quizzes, exciting competitions, and engaging activities designed to test your biology expertise.
Whether you're a student preparing for an exam, a teacher building curriculum, or just a curious mind, our articles and activities will help you explore the world of life — from cells to ecosystems, genetics to evolution, and everything in between.
Test what you've learned
Short, focused interactive challenges that turn passive reading into actual fluency.
Try the Biology Activities →