Cladogram and Dichotomous Keys

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

• physical features

• weather patterns

• environment

• diet

According to this cladogram, birds are LEAST related to: 

• Amphibians

• Sharks

• Ray Finned Fish

• Crocodiles

Tags

NGSS.MS-LS4-2

According to this cladogram, sharks are MOST closely related to which organism? 

• Amphibians

• Ray finned fish

• Crocodiles

• Birds

Tags

NGSS.MS-LS4-2

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

The primary purpose of a dichotomous key in biology: (a)   . When using a dichotomous key to identify organisms, we look at: ​ (b)  

• To predict the evolutionary future

• A step-by-step way to identify organisms

• To classify organisms based on genetics

• To determine the age of fossils

• physical features

• genetics

• habitat and population

• fossils

A branched diagram that shows relationship among organisms is called what?

• Cladogram

• Dichotomous key

• Flow Chart

• Scientific names

Tags

NGSS.MS-LS4-2

What tool is used to compare two traits in a step-by-step fashion to help one identify an organism?

• Cladogram

• Dichotomous Key

• Graph

What tool is a branched diagram that shows relationship among organisms, including common ancestors, and you look to the RIGHT

• Dichotomous Key

• Cladogram

• Graph

Dichotomous Keys

• Unlocks Dichotomous Doors

• Are the specific 2 word Scientific names for organisms

• Consist of questions to help us identify organisms

• Comes before Phylum in Taxonomy

Which of these is not a form of classification?

• Taxonomy

• Dichotomous Key

• Snails

• Cladogram