Dichotomous key

Front

What is a dichotomous key?

Back

A dichotomous key is a tool that allows the identification of organisms through a series of choices that lead the user to the correct name of a given item.

Front

What is the first step in using a dichotomous key?

Back

The first step is to start with the first question or statement in the key.

Front

What type of features do we examine when using a dichotomous key?

Back

We examine physical features of the organisms.

Front

How many legs do insects typically have?

Back

Insects typically have 6 legs.

Front

How many legs do arachnids typically have?

Back

Arachnids typically have 8 legs.

Front

What is a common characteristic used to distinguish between arachnids and insects?

Back

The presence of antennae.

Front

What is an example of a physical feature used in a dichotomous key?

Back

The number of spots on a wing cover.

Front

What is the purpose of a dichotomous key?

Back

The purpose is to help identify unknown organisms by answering a series of questions.

Front

What is a propodus?

Back

A propodus is a part of a crab's claw that is used for grasping.

Front

What is a cheliped?

Back

A cheliped is a clawed limb of a crab or similar crustacean.