In a dichotomous key, organisms should be classified based on their

• diet

• habitat

• observable features

• sounds they make

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

• 1

• 2

• 3

• 4

Why do scientists use dichotomous keys?

• To arrange organisms based on habitat

• To determine evolutionary history

• To identify different organisms

• To analyse feeding habits

Which of the following is a centipede?

• 
• 
• 
• 

Identify leaf F

• Cydonia

• Magnolia

• Aesculus

• Fraxinus

• Ilex

What feature does this dichotomous key use to identify organisms?

• Number of legs

• Body colour and pattern

• Presence of wings

• Surface features

Tags

NGSS.MS-LS4-2

If you were to make a dichotomous key to identify this organism, which option would NOT be used?

• Presence of webbed feet

• Presence of tail

• Fur on the body

• Ability to swim

• Absence of wings

Tags

NGSS.MS-LS4-2

Which of the following organisms is M. erminea?

• A

• B

• C

• D

• E

Tags

NGSS.MS-LS4-2

Based on the dichotomous key, which bird is Certhidea? (Slender = thin; stout= round)

• Bird W

• Bird X

• Bird Y

• Bird Z

Tags

NGSS.MS-LS4-2

Identify the plant shown

• A

• B

• C

• D

Tags

NGSS.4-LS1-1