Dichotomous Key

Which leaf is shown in the drawing?

Which letter in the picture has two pairs of wings?

A student discovers an arachnid with a segmented abdomen, long legs, and a tail with no stinger.

The student uses the dichotomous key below to identify it.

1. a) Abdomen segmented.............go to 2

b) Abdomen not segmented ......go to 4

2. a) Abdomen with tail....................go to 3

b) Abdomen without tail...............go to 5

3. a) Tail with stinger..........................Scorpion

b) Tail without stinger.....................Whip scorpion

4. a) Legs longer than body.............Daddy Long Legs

b) Legs not longer than body……….Wind scorpion

5. a) Covered with spines .......................Mite

b) Few spines.....................................Tick

Identify the plant shown

Identify leaf F

Why do scientists use dichotomous keys?

How many options should every branch in a dichotomous key have?

When using a dichotomous key to identify organisms, what do we look at?

What step do we always start with when using dichotomous keys?

What is the purpose of a dichotomous key?