Biology Practice
High school biology covers how molecules build organisms, heredity and the flow of genetic information, evolution and common ancestry, and ecosystems and their dynamics. Practice each concept with a voice tutor and a smart board — free.
A worked example
A tall pea plant (Tt) is crossed with a short one (tt). What fraction of offspring are tall?
The cross Tt × tt gives Tt, Tt, tt, tt — two tall and two short, so 1/2 are tall.
Frequently asked
What does high school biology cover?
From molecules to organisms (cells, energy, and matter), heredity and inheritance, biological evolution and common ancestry, and ecology — populations, ecosystems, and their dynamics.
Is biology practice free?
Yes — completely. It's free forever for K-12 students, with voice tutoring and step-by-step help and no card required.