STAAR Dichotomous Key

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

• Step 1

• Step 2

• Step 3

• Last step

The word "dichotomous" means...

• not living

• divided into two parts

• two cots for me to sleep on

When using a dichotomous key to identify organisms, what do we look at?
(a)  ______________________ .

• diet

• environment

• weather patterns

• physical features

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?

• Juniper

• Pine

• Spruce

• Fir

What is monster # 4 ?

• Alienus Fuzzicus

• Alienus Stripicus

• Alienus Quadlegicus

• Alienus Blobicus

What is the name of bird W?
(a)  ________________________

• Geospiza

• Certhidea

• Camarhynchus

• Platyspiza

Tags

NGSS.MS-LS4-2

What is the purpose of a dichotomous key?

• to find a common ancestor

• to show the evolution of organisms

• to see what organisms eat

• to identify organisms

Identify leaf F

(a) __________________

• Cydonia

• Magnolia

• Aesculus

• Fraxinus

• Ilex

A student examines the winged insect using the picture.

Based on the key, in what order should this insect be classified?

• Mantodea

• Raphidioptera

• Coleoptera

• Mecoptera

An illustration and a dichotomous key are given. What is the correct classification for this organism?

• Class Insecta

• Order Scorpiones

• Order Araneae

• Order Amblypygi

Tags

NGSS.MS-LS4-2