Dichotomous Keys

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

• physical features
• weather patterns
• environment
• diet

A dichotomous key for trees is provided. Hikers found a tree that has large brown cones and needles are in groups of 2 or more. What species of tree have the hikers found?

• Juniper
• Pine
• Spruce
• Fir

What is the name of bird X?

• Certhidea
• Geospiza
• Camarhynchus
• Platyspiza

What is the name of bird Y?

• Certhidea
• Geospiza
• Camarhynchus
• Platyspiza

What is a dichotomous key used for in science?

• To organize biomes
• Classify organisms
• Identify bacteria only
• None of these

A student discovers an arachnid with an abdomen that is not segmented , legs that are longer than the body.  The student uses the dichotomous key below to identify it. Which arachnid has the student found?

• Whip Scorpion
• Wind Scorpion
• Daddy long legs
• Scorpion

A dichotomous key for insects is given. To what order does an insect with two pairs that are covered in soft scales belong?

• Coleoptera
• Heteroptera
• Diptera
• Lepidoptera

The scientific name for an organism is made from the:

• class and family name
• genus and species name
• domain and kingdom name
• kingdom and phylum name

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

• dichotomous key
• binomial nomenclature
• scientific name
• binomial key

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

• physical features
• weather patterns
• environment
• diet