Dichotomous Keys

Front

Tool used by a taxonomist to identify an unknown organism is a:

Back

dichotomous key

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

Which characteristic could be used to distinguish between arachnids and insects? Jointed legs, Body segments, Presence of eyes, Presence of antennae

Back

Presence of antennae

Front

A botanist discovers a new plant in the jungle. Which of the following observations of the plant’s characteristics would be useful in determining its identity 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

When using a dichotomous key to identify organisms, what do we look at? Options: physical features, weather patterns, environment, diet

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physical features

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?

Back

Spruce

Front

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

Back

We always start with the first step.

Front

What is the name of bird W? Options: Certhidea, Geospiza, Camarhynchus, Platyspiza

Back

Geospiza

Front

What is the name of bird Z? Options: Certhidea, Geospiza, Camarhynchus, Platyspiza

Back

Camarhynchus

Front

A student discovers an arachnid with a segmented abdomen, long legs, and a tail with no stinger. Which arachnid has the student found? Options: Whip Scorpion, Wind Scorpion, Daddy long legs, Scorpion

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Whip Scorpion