A dichotomous key is a tool that allows the user to determine the identity of items in the natural world, such as trees, wildflowers, mammals, reptiles, rocks, and fish. Dichotomous keys always give two choices in each step.
1- Paleozoic era
2- mesozoic era
3- Cenozoic era
D. You would represent a tall plant with an uppercase T and the dwarf with a lowercase t.
