Dichotomous Key Lesson

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

From the table, which two animals are MOST CLOSELY related

• House Cate and Red Fox
• Red Fox and Dog
• Dog and Wolf
• Wolf and Gopher

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-3

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

A dichotomous key for insects is given. To what order does an insect with two pairs of scaly wings belong?

• Coleoptera
• Heteroptera
• Diptera
• Lepidoptera

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

• physical features
• weather patterns
• environment
• diet

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NGSS.MS-LS4-2

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

• 1
• 2
• 3
• 4

Using this dichotomous key, identity the name of the circled fish.

• band-tail puffer
• spotted goat fish
• peacock flounder
• trumpet fish

What is the name of bird W?

• Certhidea
• Geospiza
• Camarhynchus
• Platyspiza

Tags

NGSS.MS-LS4-2

What is a dichotomous key used for in science?

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

Which organism has feathers but does not swim?

• Duck

• Hen

• Lizard

• Snake