Units
All 7 units of Biology 30. Each one has a concepts page to learn from, practice questions marked as you go, and quizzes built at random.
Unit 1
Cell division, genetics and molecular biology
How cells copy themselves, how traits get passed on, and how DNA actually gets read.
Unit 2
Molecular genetics and biotechnology
DNA replication and protein synthesis in detail, how mutations change proteins, and tools like PCR and gel electrophoresis.
Unit 3
Nervous and endocrine systems
How signals travel along neurons, what the parts of the nervous system do, and how hormones keep the body in balance.
Unit 4
The senses: vision, hearing and balance
How the eye and ear turn light and sound into nerve impulses, what goes wrong with them, and how sensory receptors work.
Unit 5
Population and community dynamics
Hardy–Weinberg, how populations grow and level off, and how species live alongside each other.
Unit 6
Reproductive systems and hormones
The male and female reproductive systems, the hormones of the menstrual cycle, and how reproductive technologies work.
Studying for the exam?
Mix every unit together
Build a random quiz drawn from all 132 questions across every unit, at the level you choose. It is the closest thing here to a real exam.