Every biology source. Step-by-step solutions with diagrams, pathway maps, and Punnett squares. Plus AI for anything not in a textbook. Unlock answers from Chegg, Numerade, CourseHero, and Bartleby — and get custom AI solutions for graduate-level biology no textbook covers.
Biology solver — every problem, step-by-step, instantly.
5 free unlocks, no credit card. Starting at $1.45/week for 150 solutions across every biology source.
8+
Bio Sources
Instant
Solutions
$1.45/wk
Starting Price
5 Free
Unlocks
In 2026, there are two ways to solve a biology problem fast — and StudySolutions is the only platform that does both in one place. Whether your problem is from Campbell, Raven, Marieb, or a custom case study your professor wrote, you get a full step-by-step solution with diagrams, pathway maps, and Punnett squares instantly.
Chegg, Numerade, and CourseHero have millions of worked biology problems — written by biology tutors and graduate students. Punnett squares, pedigree analyses, labeled cell diagrams, metabolic pathway maps, and final answers for every textbook problem you will see in undergrad and most of grad school.
If your problem set comes from a standard biology textbook, the odds are extremely high the solution already exists. StudySolutions unlocks it instantly without paying eight separate subscriptions. See our free textbook solutions guide for full coverage.
ChatGPT-4o and Claude handle any biology from intro bio to graduate-level molecular biology. Custom case studies your professor wrote, novel ecology problems, mechanism predictions for unfamiliar pathways, problems from non-standard textbooks — AI generates a complete solution with every principle explained.
AI does not need a textbook. It identifies the biological concept, sets up the pathway or Punnett square, and works through the problem the way a graduate TA would. For the broader STEM combo, see our chemistry solver and physics solver guides — the same workflow applies to biology.
The result: there is no biology problem this combination cannot solve. Standard textbook problems get unlocked. Custom problems and unfamiliar pathways get solved by AI. Either way, you get step-by-step working with the principles explained, not just the final boxed answer.
Three steps, under 3 minutes. Works for any biology problem, any level, any source.
If the problem is from a textbook, paste the Chegg, Numerade, CourseHero, or Bartleby URL into the StudySolutions unlock tool. If the problem is custom — your professor wrote it, the textbook is obscure, or no solution exists online — describe it to AI directly. Include the relevant biological context (organism, system, conditions) and what you need to find.
For textbook problems, the unlocked solution appears instantly with labeled diagrams, Punnett squares, pathway maps, pedigree analyses where relevant, and the boxed final answer. For AI-solved problems, you get a complete worked solution with each step explained — identifying the biological concept, choosing the right framework, and arriving at the answer. No truncation, no “Pro upgrade required” teasers.
Read through the steps until the biology clicks. For pure problem sets, copy your final work. For written biology assignments — lab reports, research summaries, essay questions, dissection write-ups — humanize the AI-generated text before submitting. See our unlocks page for the full submission workflow.
Unlock step-by-step solutions from Chegg, Numerade, and more.
From intro biology to graduate-level molecular biology. Every topic, every level. If the course says “Biology” in the title, StudySolutions has it covered.
| Source | Coverage |
|---|---|
| Chegg | Thousands of biology textbook solutions, step-by-step, expert Q&A |
| Numerade | STEM video walkthroughs — instructors explaining biology on camera |
| CourseHero | Biology study guides, worked problems, lecture notes, lab reports |
| Bartleby | Biology textbook solutions, labeled diagrams, pathway maps |
| Studocu | Past biology exams, lab reports, dissection guides by course |
| Quizlet | Cell organelles, taxonomy, metabolic pathways, anatomy flashcards |
| CliffsNotes | Biology topic summaries, A&P study guides, AP Bio review |
| AI (ChatGPT/Claude) | Any problem not in textbooks — custom solutions with pathways and mechanisms |
One subscription covers every source. No more juggling Chegg + Numerade + CourseHero + Bartleby subscriptions — all under StudySolutions, with AI for anything not in those databases. For the video walkthrough side specifically, see our Numerade answers free guide.
If you currently pay for biology solver tools, you are almost certainly overpaying. Here is the side-by-side.
| Platform | Price | Coverage |
|---|---|---|
| Chegg | $15.95/month | Chegg solutions only |
| Numerade | $14.99/month | STEM video solutions only |
| CourseHero | $9.95/month | Study guides only, no AI |
| Total Individual | $40.89/month | 3 sources |
| StudySolutions | $1.45/week (~$5.80/mo) | ALL 8+ sources + AI |
| Savings | 86% cheaper | 2x more coverage |
See our best Chegg alternatives guide for the full breakdown of why StudySolutions beats individual subscriptions for biology, chemistry, physics, and every other STEM subject.
Homework Pass: 150 unlocks/week across every platform.
All weekly billing from studysolutions.app/billing. No contracts. Cancel anytime.
Try 5 biology solutions free
BEST FOR BIOLOGY — all sources, 150 solutions/week
Exam prep, multiple biology courses
Biology solutions + lab report humanizer + Turnitin
Full course load
Why Homework Pass Is the Biology Solver Pick
If your workload is mostly biology problem sets and other STEM problems, the Homework Pass at $1.45/week is the best value. 150 unlocks per week — averaging out to over 20 biology solutions per day. No per-source fees, no per-topic limits. If you need more for exam weeks across multiple biology courses, Homework+ Pass at $2.49/week gives 350 unlocks. If you also have lab reports or biology essays to write, upgrade to the Study Pass at $4.50/week which adds the humanizer and Turnitin verification.
Every question students ask about biology solvers. Direct answers, no fluff.