Dichotomous Key Practice

Front

What is the purpose of a dichotomous key?

Back

to identify organisms

Front

A dichotomous key for trees is provided. Hikers found a tree that has large brown cones and single sharp needles. What species of tree have the hikers found? Options: Juniper, Pine, Spruce, Fir

Back

Spruce

Front

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

Back

1

Front

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

Back

physical features

Front

The 8 levels of classification, most broad to most specific.

Back

Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species

Front

To what order does an insect with two pairs of scaly wings belong? Options: Coleoptera, Heteroptera, Diptera, Lepidoptera

Back

Lepidoptera

Front

An illustration and a dichotomous key are given. What is the correct classification for this organism? Options: Class Insecta, Order Amblygygi, Order Araneae, Order Scorpiones

Back

Order Araneae

Front

Characteristic to distinguish between arachnids and insects: Jointed legs, Body segments, Presence of eyes, Presence of antennae

Back

Presence of antennae

Front

Observation useful for identifying a new plant with a dichotomous key: It was discovered in the summertime, It is wet from a recent rain storm., Its leaves curl up on the edges., It is eaten by native jungle ants.

Back

Its leaves curl up on the edges.

Front

A student discovers an arachnid without a segmented abdomen, and legs longer than its body. Which arachnid has the student found? Options: Whip Scorpion, Wind Scorpion, Daddy long legs, Scorpion.

Back

Daddy long legs