LI1.F Dichotomous Keys

What is the purpose of a dichotomous key?

• to find a common ancestor
• to show the evolution of organisms
• to show relationships between organisms
• to identify organisms

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

• physical features
• weather patterns
• environment
• diet

How many options should every branch in a dichotomous key have?

• 1

• 2

• 3

• 4

The first part of a scientific name is an organism's _______________ and the second part is its ________________.

• species, genus
• phylum, order
• class, spices
• genus, species

What should you do when typing a scientific name?

• Capitalize the first word
• Capitalize the first word and underline the whole thing
• Capitalize the first word and italicize the whole thing
• Nothing

Which of the following features are used to classify a centipede (select all that apply)?

• Has wings

• Has no wings

• Has more than 8 legs

• Has a shell

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.

What is the name of bird Z?

• Certhidea
• Geospiza
• Camarhynchus
• Platyspiza

A student discovers an arachnid with a segmented abdomen, long legs, and a tail with no stinger. The student uses the dichotomous key below to identify it. Which arachnid has the student found?

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

Identify leaf F

• Cydonia

• Magnolia

• Aesculus

• Fraxinus

• Ilex