Dichotomous keys are keys (things that help you work out what an organism is) which give you two possiblites for each stage.
Entities this key will use: A human, a zebra and a lion.
- 1a. walks on two legs ---> human
- 1b. walks on four legs ---> go to 2.
- 2a. is stripy ---> zebra
- 2b. is not stripy ---> lion