Biology 2 practice
Biology 2: 168 scored questions and 166 ungraded exercises. Browse chapters and source lessons; practice free without an account.
Covers Evolution and the Origin of Species, The Evolutionary History of Biological Diversity and Plant Diversity, Form, and Function, and 10 more chapters.
Scored questions use recorded source keys. Ungraded exercises support self-checking. Some items lack explanations or require review; practice scores do not establish exam readiness. No account is required.
A place to begin
Read, practice, and connect the ideas
Start with the characteristics animals share, then compare invertebrates and vertebrates. Read a lesson, try its practice, and return to any distinction you found difficult.
What makes an organism an animal?
Build a foundation before comparing animal groups.
Explore invertebrates
Compare the diversity of animals without backbones.
Explore vertebrates
Use the comparison to organize the major animal groups.
Try a short session, use the explanations to revisit difficult ideas, and save questions you want to return to. Your progress stays in this browser.
Chapters and topics
- Evolution and the Origin of Species — 15 exercises
- The Evolutionary History of Biological Diversity — 59 exercises
- Plant Diversity, Form, and Function — 20 exercises
- Animal Diversity — 15 exercises
- Animal Form and Function — 16 exercises
- Ecology and the Biosphere — 32 exercises
- Study notes — 168 exercises
- Mechanisms of Evolution — 16 exercises
- Plant Form & Function — 12 exercises
- Animal Form & Function Guide — 23 exercises
- Ecology & the Biosphere Guide — 8 exercises
Interactive practice needs JavaScript. Read the source lessons.